80717939 has 4 divisors (see below), whose sum is σ = 81232224. Its totient is φ = 80203656.

The previous prime is 80717929. The next prime is 80717953. The reversal of 80717939 is 93971708.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80717939 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 80717939.

It is not an unprimeable number, because it can be changed into a prime (80717929) 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, 256907 + ... + 257220.

It is an arithmetic number, because the mean of its divisors is an integer number (20308056).

Almost surely, 2^80717939 is an apocalyptic number.

80717939 is a deficient number, since it is larger than the sum of its proper divisors (514285).

80717939 is a wasteful number, since it uses less digits than its factorization.

80717939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514284.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 80717939 is about 8984.3162789385. The cubic root of 80717939 is about 432.1720618757.

The spelling of 80717939 in words is "eighty million, seven hundred seventeen thousand, nine hundred thirty-nine".