80690557 has 8 divisors (see below), whose sum is σ = 83620440. Its totient is φ = 77770560.

The previous prime is 80690537. The next prime is 80690563. The reversal of 80690557 is 75509608.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23097636 + 57592921 = 4806^2 + 7589^2 .

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 80690557 - 2⁷ = 80690429 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 (80690507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16807 + ... + 21067.

It is an arithmetic number, because the mean of its divisors is an integer number (10452555).

Almost surely, 2^80690557 is an apocalyptic number.

It is an amenable number.

80690557 is a deficient number, since it is larger than the sum of its proper divisors (2929883).

80690557 is a wasteful number, since it uses less digits than its factorization.

80690557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4943.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 80690557 is about 8982.7922718941. The cubic root of 80690557 is about 432.1231876769.

The spelling of 80690557 in words is "eighty million, six hundred ninety thousand, five hundred fifty-seven".