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80708081 = 2318119387
BaseRepresentation
bin1001100111110…
…00000111110001
312121212101200012
410303320013301
5131130124311
612001504305
72000002346
oct463700761
9177771605
1080708081
11416151a3
1223042095
131394a77c
14aa0c7cd
15714378b
hex4cf81f1

80708081 has 8 divisors (see below), whose sum is σ = 84686784. Its totient is φ = 76768560.

The previous prime is 80708051. The next prime is 80708083. The reversal of 80708081 is 18080708.

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

It is a cyclic number.

It is not a de Polignac number, because 80708081 - 210 = 80707057 is a prime.

It is a super-2 number, since 2×807080812 = 13027588677405122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80708083) 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, 5531 + ... + 13856.

It is an arithmetic number, because the mean of its divisors is an integer number (10585848).

Almost surely, 280708081 is an apocalyptic number.

It is an amenable number.

80708081 is a deficient number, since it is larger than the sum of its proper divisors (3978703).

80708081 is a wasteful number, since it uses less digits than its factorization.

80708081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19591.

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 80708081 is about 8983.7676394706. The cubic root of 80708081 is about 432.1544675809.

Adding to 80708081 its reverse (18080708), we get a palindrome (98788789).

The spelling of 80708081 in words is "eighty million, seven hundred eight thousand, eighty-one".

Divisors: 1 23 181 4163 19387 445901 3509047 80708081