315668193 has 4 divisors (see below), whose sum is σ = 420890928. Its totient is φ = 210445460.

The previous prime is 315668179. The next prime is 315668207. The reversal of 315668193 is 391866513.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 391866513 = 3 ⋅130622171.

It is an interprime number because it is at equal distance from previous prime (315668179) and next prime (315668207).

It is a cyclic number.

It is not a de Polignac number, because 315668193 - 2²⁵ = 282113761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (315668153) 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, 52611363 + ... + 52611368.

It is an arithmetic number, because the mean of its divisors is an integer number (105222732).

Almost surely, 2^315668193 is an apocalyptic number.

It is an amenable number.

315668193 is a deficient number, since it is larger than the sum of its proper divisors (105222735).

315668193 is a wasteful number, since it uses less digits than its factorization.

315668193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105222734.

The product of its digits is 116640, while the sum is 42.

The square root of 315668193 is about 17767.0535824036. The cubic root of 315668193 is about 680.8899772877.

The spelling of 315668193 in words is "three hundred fifteen million, six hundred sixty-eight thousand, one hundred ninety-three".