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8707130639 = 25913360529
BaseRepresentation
bin10000001101111110…
…00100010100001111
3211110211000001202222
420012333010110033
5120313011140024
64000000005555
7425525250344
oct100677042417
924424001688
108707130639
113768a48139
1218300008bb
13a89bab00c
145c857a7cb
1535e62a85e
hex206fc450f

8707130639 has 4 divisors (see below), whose sum is σ = 8710493760. Its totient is φ = 8703767520.

The previous prime is 8707130609. The next prime is 8707130713. The reversal of 8707130639 is 9360317078.

8707130639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8707130639 - 228 = 8438695183 is a prime.

It is a super-2 number, since 2×87071306392 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8707130639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8707130609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1677674 + ... + 1682855.

It is an arithmetic number, because the mean of its divisors is an integer number (2177623440).

Almost surely, 28707130639 is an apocalyptic number.

8707130639 is a deficient number, since it is larger than the sum of its proper divisors (3363121).

8707130639 is a wasteful number, since it uses less digits than its factorization.

8707130639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363120.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 8707130639 is about 93312.0069390858. The cubic root of 8707130639 is about 2057.2718653426.

The spelling of 8707130639 in words is "eight billion, seven hundred seven million, one hundred thirty thousand, six hundred thirty-nine".

Divisors: 1 2591 3360529 8707130639