312690523 has 2 divisors, whose sum is σ = 312690524. Its totient is φ = 312690522.

The previous prime is 312690473. The next prime is 312690533. The reversal of 312690523 is 325096213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312690523 is a prime.

It is not a weakly prime, because it can be changed into another prime (312690533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156345261 + 156345262.

It is an arithmetic number, because the mean of its divisors is an integer number (156345262).

Almost surely, 2^312690523 is an apocalyptic number.

312690523 is a deficient number, since it is larger than the sum of its proper divisors (1).

312690523 is an equidigital number, since it uses as much as digits as its factorization.

312690523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 312690523 is about 17683.0575127719. The cubic root of 312690523 is about 678.7422851951.

The spelling of 312690523 in words is "three hundred twelve million, six hundred ninety thousand, five hundred twenty-three".