311907749 has 2 divisors, whose sum is σ = 311907750. Its totient is φ = 311907748.

The previous prime is 311907719. The next prime is 311907769. The reversal of 311907749 is 947709113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190246849 + 121660900 = 13793^2 + 11030^2 .

It is a cyclic number.

It is not a de Polignac number, because 311907749 - 2²⁸ = 43472293 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 (311907719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155953874 + 155953875.

It is an arithmetic number, because the mean of its divisors is an integer number (155953875).

Almost surely, 2^311907749 is an apocalyptic number.

It is an amenable number.

311907749 is a deficient number, since it is larger than the sum of its proper divisors (1).

311907749 is an equidigital number, since it uses as much as digits as its factorization.

311907749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 311907749 is about 17660.9101973822. The cubic root of 311907749 is about 678.1754352940.

The spelling of 311907749 in words is "three hundred eleven million, nine hundred seven thousand, seven hundred forty-nine".