312945247 has 2 divisors, whose sum is σ = 312945248. Its totient is φ = 312945246.

The previous prime is 312945229. The next prime is 312945301. The reversal of 312945247 is 742549213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312945247 - 2¹¹ = 312943199 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 (312945047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156472623 + 156472624.

It is an arithmetic number, because the mean of its divisors is an integer number (156472624).

Almost surely, 2^312945247 is an apocalyptic number.

312945247 is a deficient number, since it is larger than the sum of its proper divisors (1).

312945247 is an equidigital number, since it uses as much as digits as its factorization.

312945247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 312945247 is about 17690.2585340068. The cubic root of 312945247 is about 678.9265408848.

The spelling of 312945247 in words is "three hundred twelve million, nine hundred forty-five thousand, two hundred forty-seven".