312663497 has 4 divisors (see below), whose sum is σ = 316176660. Its totient is φ = 309150336.

The previous prime is 312663493. The next prime is 312663509. The reversal of 312663497 is 794366213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794366213 = 14923 ⋅53231.

It can be written as a sum of positive squares in 2 ways, for example, as 174741961 + 137921536 = 13219^2 + 11744^2 .

It is a cyclic number.

It is not a de Polignac number, because 312663497 - 2² = 312663493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312663493) 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, 1756448 + ... + 1756625.

It is an arithmetic number, because the mean of its divisors is an integer number (79044165).

Almost surely, 2^312663497 is an apocalyptic number.

It is an amenable number.

312663497 is a deficient number, since it is larger than the sum of its proper divisors (3513163).

312663497 is an equidigital number, since it uses as much as digits as its factorization.

312663497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513162.

The product of its digits is 163296, while the sum is 41.

The square root of 312663497 is about 17682.2933184584. The cubic root of 312663497 is about 678.7227299520.

The spelling of 312663497 in words is "three hundred twelve million, six hundred sixty-three thousand, four hundred ninety-seven".