316646399 has 4 divisors (see below), whose sum is σ = 317473536. Its totient is φ = 315819264.

The previous prime is 316646387. The next prime is 316646441. The reversal of 316646399 is 993646613.

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

It is a cyclic number.

It is not a de Polignac number, because 316646399 - 2¹⁶ = 316580863 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 (316646339) 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, 412994 + ... + 413759.

It is an arithmetic number, because the mean of its divisors is an integer number (79368384).

Almost surely, 2^316646399 is an apocalyptic number.

316646399 is a deficient number, since it is larger than the sum of its proper divisors (827137).

316646399 is an equidigital number, since it uses as much as digits as its factorization.

316646399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827136.

The product of its digits is 629856, while the sum is 47.

The square root of 316646399 is about 17794.5609386689. The cubic root of 316646399 is about 681.5925756305.

The spelling of 316646399 in words is "three hundred sixteen million, six hundred forty-six thousand, three hundred ninety-nine".