312995047 has 2 divisors, whose sum is σ = 312995048. Its totient is φ = 312995046.

The previous prime is 312995029. The next prime is 312995071. The reversal of 312995047 is 740599213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312995047 - 2¹⁹ = 312470759 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312995027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156497523 + 156497524.

It is an arithmetic number, because the mean of its divisors is an integer number (156497524).

Almost surely, 2^312995047 is an apocalyptic number.

312995047 is a deficient number, since it is larger than the sum of its proper divisors (1).

312995047 is an equidigital number, since it uses as much as digits as its factorization.

312995047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 312995047 is about 17691.6660323442. Note that the first 3 decimals coincide. The cubic root of 312995047 is about 678.9625522412.

The spelling of 312995047 in words is "three hundred twelve million, nine hundred ninety-five thousand, forty-seven".