313391236 has 6 divisors (see below), whose sum is σ = 548434670. Its totient is φ = 156695616.

The previous prime is 313391233. The next prime is 313391251. The reversal of 313391236 is 632193313.

It can be written as a sum of positive squares in only one way, i.e., 313077636 + 313600 = 17694^2 + 560^2 .

It is a junction number, because it is equal to n+sod(n) for n = 313391198 and 313391207.

It is not an unprimeable number, because it can be changed into a prime (313391233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39173901 + ... + 39173908.

Almost surely, 2^313391236 is an apocalyptic number.

It is an amenable number.

313391236 is a deficient number, since it is larger than the sum of its proper divisors (235043434).

313391236 is a wasteful number, since it uses less digits than its factorization.

313391236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78347813 (or 78347811 counting only the distinct ones).

The product of its digits is 8748, while the sum is 31.

The square root of 313391236 is about 17702.8595430230. The cubic root of 313391236 is about 679.2489082906.

The spelling of 313391236 in words is "three hundred thirteen million, three hundred ninety-one thousand, two hundred thirty-six".