311432969 has 2 divisors, whose sum is σ = 311432970. Its totient is φ = 311432968.

The previous prime is 311432939. The next prime is 311433029. The reversal of 311432969 is 969234113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240250000 + 71182969 = 15500^2 + 8437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311432969 is a prime.

It is a super-2 number, since 2×311432969² = 193980988360309922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311432939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155716484 + 155716485.

It is an arithmetic number, because the mean of its divisors is an integer number (155716485).

Almost surely, 2^311432969 is an apocalyptic number.

It is an amenable number.

311432969 is a deficient number, since it is larger than the sum of its proper divisors (1).

311432969 is an equidigital number, since it uses as much as digits as its factorization.

311432969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 38.

The square root of 311432969 is about 17647.4635287908. The cubic root of 311432969 is about 677.8311586661.

The spelling of 311432969 in words is "three hundred eleven million, four hundred thirty-two thousand, nine hundred sixty-nine".