80582813 has 4 divisors (see below), whose sum is σ = 80697180. Its totient is φ = 80468448.

The previous prime is 80582807. The next prime is 80582833. The reversal of 80582813 is 31828508.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39967684 + 40615129 = 6322^2 + 6373^2 .

It is a cyclic number.

It is not a de Polignac number, because 80582813 - 2²⁶ = 13473949 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 (80582833) 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, 56120 + ... + 57537.

It is an arithmetic number, because the mean of its divisors is an integer number (20174295).

Almost surely, 2^80582813 is an apocalyptic number.

It is an amenable number.

80582813 is a deficient number, since it is larger than the sum of its proper divisors (114367).

80582813 is a wasteful number, since it uses less digits than its factorization.

80582813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114366.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 80582813 is about 8976.7930242376. The cubic root of 80582813 is about 431.9307677263.

The spelling of 80582813 in words is "eighty million, five hundred eighty-two thousand, eight hundred thirteen".