916580813 has 4 divisors (see below), whose sum is σ = 946147968. Its totient is φ = 887013660.

The previous prime is 916580803. The next prime is 916580851. The reversal of 916580813 is 318085619.

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 916580813 - 2⁸ = 916580557 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 (916580803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14783531 + ... + 14783592.

It is an arithmetic number, because the mean of its divisors is an integer number (236536992).

Almost surely, 2^916580813 is an apocalyptic number.

It is an amenable number.

916580813 is a deficient number, since it is larger than the sum of its proper divisors (29567155).

916580813 is a wasteful number, since it uses less digits than its factorization.

916580813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29567154.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 916580813 is about 30275.0856811339. The cubic root of 916580813 is about 971.3824525590.

The spelling of 916580813 in words is "nine hundred sixteen million, five hundred eighty thousand, eight hundred thirteen".