80856693 has 6 divisors (see below), whose sum is σ = 116793014. Its totient is φ = 53904456.

The previous prime is 80856689. The next prime is 80856701. The reversal of 80856693 is 39665808.

80856693 is a `hidden beast` number, since 80 + 8 + 566 + 9 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 74338884 + 6517809 = 8622^2 + 2553^2 .

It is not a de Polignac number, because 80856693 - 2² = 80856689 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 (80856613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4492030 + ... + 4492047.

Almost surely, 2^80856693 is an apocalyptic number.

It is an amenable number.

80856693 is a deficient number, since it is larger than the sum of its proper divisors (35936321).

80856693 is a wasteful number, since it uses less digits than its factorization.

80856693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8984083 (or 8984080 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 80856693 is about 8992.0349754658. The cubic root of 80856693 is about 432.4195544634.

The spelling of 80856693 in words is "eighty million, eight hundred fifty-six thousand, six hundred ninety-three".