312564403 has 2 divisors, whose sum is σ = 312564404. Its totient is φ = 312564402.

The previous prime is 312564389. The next prime is 312564481. The reversal of 312564403 is 304465213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312564403 - 2²⁵ = 279009971 is a prime.

It is not a weakly prime, because it can be changed into another prime (312544403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156282201 + 156282202.

It is an arithmetic number, because the mean of its divisors is an integer number (156282202).

Almost surely, 2^312564403 is an apocalyptic number.

312564403 is a deficient number, since it is larger than the sum of its proper divisors (1).

312564403 is an equidigital number, since it uses as much as digits as its factorization.

312564403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 312564403 is about 17679.4910277417. The cubic root of 312564403 is about 678.6510187167.

It can be divided in two parts, 3125 and 64403, that added together give a triangular number (67528 = T₃₆₇).

The spelling of 312564403 in words is "three hundred twelve million, five hundred sixty-four thousand, four hundred three".