311872959389 has 2 divisors, whose sum is σ = 311872959390. Its totient is φ = 311872959388.

The previous prime is 311872959379. The next prime is 311872959397. The reversal of 311872959389 is 983959278113.

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., 250645416025 + 61227543364 = 500645^2 + 247442^2 .

It is a cyclic number.

It is not a de Polignac number, because 311872959389 - 2⁴ = 311872959373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311872959379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155936479694 + 155936479695.

It is an arithmetic number, because the mean of its divisors is an integer number (155936479695).

Almost surely, 2^311872959389 is an apocalyptic number.

It is an amenable number.

311872959389 is a deficient number, since it is larger than the sum of its proper divisors (1).

311872959389 is an equidigital number, since it uses as much as digits as its factorization.

311872959389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29393280, while the sum is 65.

The spelling of 311872959389 in words is "three hundred eleven billion, eight hundred seventy-two million, nine hundred fifty-nine thousand, three hundred eighty-nine".