312906247 has 2 divisors, whose sum is σ = 312906248. Its totient is φ = 312906246.

The previous prime is 312906239. The next prime is 312906263. The reversal of 312906247 is 742609213.

It is a weak prime.

It is an emirp because it is prime and its reverse (742609213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312906247 - 2³ = 312906239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312904247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156453123 + 156453124.

It is an arithmetic number, because the mean of its divisors is an integer number (156453124).

Almost surely, 2^312906247 is an apocalyptic number.

312906247 is a deficient number, since it is larger than the sum of its proper divisors (1).

312906247 is an equidigital number, since it uses as much as digits as its factorization.

312906247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 312906247 is about 17689.1561980780. The cubic root of 312906247 is about 678.8983365527.

The spelling of 312906247 in words is "three hundred twelve million, nine hundred six thousand, two hundred forty-seven".