312705913 has 4 divisors (see below), whose sum is σ = 336760228. Its totient is φ = 288651600.

The previous prime is 312705901. The next prime is 312705929. The reversal of 312705913 is 319507213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 319507213 = 7691 ⋅41543.

It can be written as a sum of positive squares in 2 ways, for example, as 47927929 + 264777984 = 6923^2 + 16272^2 .

It is a cyclic number.

It is not a de Polignac number, because 312705913 - 2⁵ = 312705881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312705313) 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, 12027138 + ... + 12027163.

It is an arithmetic number, because the mean of its divisors is an integer number (84190057).

Almost surely, 2^312705913 is an apocalyptic number.

It is an amenable number.

312705913 is a deficient number, since it is larger than the sum of its proper divisors (24054315).

312705913 is a wasteful number, since it uses less digits than its factorization.

312705913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24054314.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 312705913 is about 17683.4926697188. The cubic root of 312705913 is about 678.7534204567.

The spelling of 312705913 in words is "three hundred twelve million, seven hundred five thousand, nine hundred thirteen".