311650961 has 2 divisors, whose sum is σ = 311650962. Its totient is φ = 311650960.

The previous prime is 311650951. The next prime is 311651027. The reversal of 311650961 is 169056113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172764736 + 138886225 = 13144^2 + 11785^2 .

It is a cyclic number.

It is not a de Polignac number, because 311650961 - 2¹⁰ = 311649937 is a prime.

It is not a weakly prime, because it can be changed into another prime (311650951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155825480 + 155825481.

It is an arithmetic number, because the mean of its divisors is an integer number (155825481).

Almost surely, 2^311650961 is an apocalyptic number.

It is an amenable number.

311650961 is a deficient number, since it is larger than the sum of its proper divisors (1).

311650961 is an equidigital number, since it uses as much as digits as its factorization.

311650961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 311650961 is about 17653.6387467287. The cubic root of 311650961 is about 677.9892743464.

The spelling of 311650961 in words is "three hundred eleven million, six hundred fifty thousand, nine hundred sixty-one".