318913697 has 4 divisors (see below), whose sum is σ = 319184916. Its totient is φ = 318642480.

The previous prime is 318913691. The next prime is 318913711. The reversal of 318913697 is 796319813.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 306810256 + 12103441 = 17516^2 + 3479^2 .

It is a cyclic number.

It is not a de Polignac number, because 318913697 - 2⁴ = 318913681 is a prime.

It is a super-2 number, since 2×318913697² = 203411892268415618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318913691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133838 + ... + 136199.

It is an arithmetic number, because the mean of its divisors is an integer number (79796229).

Almost surely, 2^318913697 is an apocalyptic number.

It is an amenable number.

318913697 is a deficient number, since it is larger than the sum of its proper divisors (271219).

318913697 is a wasteful number, since it uses less digits than its factorization.

318913697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271218.

The product of its digits is 244944, while the sum is 47.

The square root of 318913697 is about 17858.1549158921. The cubic root of 318913697 is about 683.2155212057.

The spelling of 318913697 in words is "three hundred eighteen million, nine hundred thirteen thousand, six hundred ninety-seven".