311463389 has 2 divisors, whose sum is σ = 311463390. Its totient is φ = 311463388.

The previous prime is 311463379. The next prime is 311463391. The reversal of 311463389 is 983364113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305655289 + 5808100 = 17483^2 + 2410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311463389 is a prime.

Together with 311463391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311463379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155731694 + 155731695.

It is an arithmetic number, because the mean of its divisors is an integer number (155731695).

Almost surely, 2^311463389 is an apocalyptic number.

It is an amenable number.

311463389 is a deficient number, since it is larger than the sum of its proper divisors (1).

311463389 is an equidigital number, since it uses as much as digits as its factorization.

311463389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 311463389 is about 17648.3253879794. The cubic root of 311463389 is about 677.8532275697.

The spelling of 311463389 in words is "three hundred eleven million, four hundred sixty-three thousand, three hundred eighty-nine".