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87000007 = 2313032903
BaseRepresentation
bin1010010111110…
…00001111000111
320001201001120111
411023320033013
5134233000012
612344413451
72104326223
oct513701707
9201631514
1087000007
1145122436
1225177287
13150415c3
14b7a9783
157987ba7
hex52f83c7

87000007 has 8 divisors (see below), whose sum is σ = 90883584. Its totient is φ = 83124888.

The previous prime is 86999989. The next prime is 87000037. The reversal of 87000007 is 70000078.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-87000007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87000037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28518 + ... + 31420.

It is an arithmetic number, because the mean of its divisors is an integer number (11360448).

Almost surely, 287000007 is an apocalyptic number.

87000007 is a deficient number, since it is larger than the sum of its proper divisors (3883577).

87000007 is a wasteful number, since it uses less digits than its factorization.

87000007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 87000007 is about 9327.3794283282. The cubic root of 87000007 is about 443.1047740534.

The spelling of 87000007 in words is "eighty-seven million, seven", and thus it is an aban number and an uban number.

Divisors: 1 23 1303 2903 29969 66769 3782609 87000007