80659957 has 4 divisors (see below), whose sum is σ = 92182816. Its totient is φ = 69137100.

The previous prime is 80659949. The next prime is 80659961. The reversal of 80659957 is 75995608.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80659957 - 2³ = 80659949 is a prime.

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 80659957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80659967) 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, 5761419 + ... + 5761432.

It is an arithmetic number, because the mean of its divisors is an integer number (23045704).

Almost surely, 2^80659957 is an apocalyptic number.

It is an amenable number.

80659957 is a deficient number, since it is larger than the sum of its proper divisors (11522859).

80659957 is a wasteful number, since it uses less digits than its factorization.

80659957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11522858.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 80659957 is about 8981.0888538083. The cubic root of 80659957 is about 432.0685565781.

The spelling of 80659957 in words is "eighty million, six hundred fifty-nine thousand, nine hundred fifty-seven".