80769857 has 8 divisors (see below), whose sum is σ = 92983296. Its totient is φ = 68725152.

The previous prime is 80769851. The next prime is 80769881. The reversal of 80769857 is 75896708.

It is a happy number.

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 80769857 - 2²⁰ = 79721281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80769851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41153 + ... + 43070.

It is an arithmetic number, because the mean of its divisors is an integer number (11622912).

Almost surely, 2^80769857 is an apocalyptic number.

It is an amenable number.

80769857 is a deficient number, since it is larger than the sum of its proper divisors (12213439).

80769857 is a wasteful number, since it uses less digits than its factorization.

80769857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84367.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 80769857 is about 8987.2051829253. The cubic root of 80769857 is about 432.2647001024.

The spelling of 80769857 in words is "eighty million, seven hundred sixty-nine thousand, eight hundred fifty-seven".