311401589 has 2 divisors, whose sum is σ = 311401590. Its totient is φ = 311401588.

The previous prime is 311401579. The next prime is 311401613. The reversal of 311401589 is 985104113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287879089 + 23522500 = 16967^2 + 4850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311401589 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 (311401549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155700794 + 155700795.

It is an arithmetic number, because the mean of its divisors is an integer number (155700795).

Almost surely, 2^311401589 is an apocalyptic number.

It is an amenable number.

311401589 is a deficient number, since it is larger than the sum of its proper divisors (1).

311401589 is an equidigital number, since it uses as much as digits as its factorization.

311401589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 311401589 is about 17646.5744267832. The cubic root of 311401589 is about 677.8083918020.

The spelling of 311401589 in words is "three hundred eleven million, four hundred one thousand, five hundred eighty-nine".