312661523 has 4 divisors (see below), whose sum is σ = 313589640. Its totient is φ = 311733408.

The previous prime is 312661519. The next prime is 312661529. The reversal of 312661523 is 325166213.

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

It is a cyclic number.

It is not a de Polignac number, because 312661523 - 2² = 312661519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312661529) 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, 463553 + ... + 464226.

It is an arithmetic number, because the mean of its divisors is an integer number (78397410).

Almost surely, 2^312661523 is an apocalyptic number.

312661523 is a deficient number, since it is larger than the sum of its proper divisors (928117).

312661523 is an equidigital number, since it uses as much as digits as its factorization.

312661523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928116.

The product of its digits is 6480, while the sum is 29.

The square root of 312661523 is about 17682.2374998189. The cubic root of 312661523 is about 678.7213015778.

The spelling of 312661523 in words is "three hundred twelve million, six hundred sixty-one thousand, five hundred twenty-three".