312462749 has 2 divisors, whose sum is σ = 312462750. Its totient is φ = 312462748.

The previous prime is 312462707. The next prime is 312462769. The reversal of 312462749 is 947264213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279892900 + 32569849 = 16730^2 + 5707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312462749 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 (312462769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156231374 + 156231375.

It is an arithmetic number, because the mean of its divisors is an integer number (156231375).

Almost surely, 2^312462749 is an apocalyptic number.

It is an amenable number.

312462749 is a deficient number, since it is larger than the sum of its proper divisors (1).

312462749 is an equidigital number, since it uses as much as digits as its factorization.

312462749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 312462749 is about 17676.6158808749. The cubic root of 312462749 is about 678.5774391384.

The spelling of 312462749 in words is "three hundred twelve million, four hundred sixty-two thousand, seven hundred forty-nine".