315690691 has 4 divisors (see below), whose sum is σ = 316423584. Its totient is φ = 314957800.

The previous prime is 315690689. The next prime is 315690707. The reversal of 315690691 is 196096513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196096513 = 17 ⋅11535089.

It is a cyclic number.

It is not a de Polignac number, because 315690691 - 2¹ = 315690689 is a prime.

It is a super-2 number, since 2×315690691² = 199321224768114962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315690091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365800 + ... + 366661.

It is an arithmetic number, because the mean of its divisors is an integer number (79105896).

Almost surely, 2^315690691 is an apocalyptic number.

315690691 is a deficient number, since it is larger than the sum of its proper divisors (732893).

315690691 is an equidigital number, since it uses as much as digits as its factorization.

315690691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732892.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 315690691 is about 17767.6867093046. The cubic root of 315690691 is about 680.9061528154.

The spelling of 315690691 in words is "three hundred fifteen million, six hundred ninety thousand, six hundred ninety-one".