316999991 has 32 divisors (see below), whose sum is σ = 403619328. Its totient is φ = 241827840.

The previous prime is 316999973. The next prime is 316999993. The reversal of 316999991 is 199999613.

It is a cyclic number.

It is not a de Polignac number, because 316999991 - 2¹⁴ = 316983607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316999993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1233335 + ... + 1233591.

It is an arithmetic number, because the mean of its divisors is an integer number (12613104).

Almost surely, 2^316999991 is an apocalyptic number.

316999991 is a deficient number, since it is larger than the sum of its proper divisors (86619337).

316999991 is a wasteful number, since it uses less digits than its factorization.

316999991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551.

The product of its digits is 1062882, while the sum is 56.

The square root of 316999991 is about 17804.4935620197. The cubic root of 316999991 is about 681.8461876825.

The spelling of 316999991 in words is "three hundred sixteen million, nine hundred ninety-nine thousand, nine hundred ninety-one".