80207857 has 4 divisors (see below), whose sum is σ = 82073200. Its totient is φ = 78342516.

The previous prime is 80207821. The next prime is 80207879. The reversal of 80207857 is 75870208.

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 80207857 - 2¹⁵ = 80175089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80207557) 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, 932607 + ... + 932692.

It is an arithmetic number, because the mean of its divisors is an integer number (20518300).

Almost surely, 2^80207857 is an apocalyptic number.

It is an amenable number.

80207857 is a deficient number, since it is larger than the sum of its proper divisors (1865343).

80207857 is a wasteful number, since it uses less digits than its factorization.

80207857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865342.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 80207857 is about 8955.8839318071. The cubic root of 80207857 is about 431.2597938825.

The spelling of 80207857 in words is "eighty million, two hundred seven thousand, eight hundred fifty-seven".