316687621 has 8 divisors (see below), whose sum is σ = 333730944. Its totient is φ = 299917200.

The previous prime is 316687607. The next prime is 316687639. The reversal of 316687621 is 126786613.

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 316687621 - 2⁵ = 316687589 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 (316687681) 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, 65841 + ... + 70486.

It is an arithmetic number, because the mean of its divisors is an integer number (41716368).

Almost surely, 2^316687621 is an apocalyptic number.

It is an amenable number.

316687621 is a deficient number, since it is larger than the sum of its proper divisors (17043323).

316687621 is a wasteful number, since it uses less digits than its factorization.

316687621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136451.

The product of its digits is 72576, while the sum is 40.

The square root of 316687621 is about 17795.7191762513. The cubic root of 316687621 is about 681.6221516182.

The spelling of 316687621 in words is "three hundred sixteen million, six hundred eighty-seven thousand, six hundred twenty-one".