31345113389 has 2 divisors, whose sum is σ = 31345113390. Its totient is φ = 31345113388.

The previous prime is 31345113379. The next prime is 31345113413. The reversal of 31345113389 is 98331154313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30803760100 + 541353289 = 175510^2 + 23267^2 .

It is a cyclic number.

It is not a de Polignac number, because 31345113389 - 2²⁴ = 31328336173 is a prime.

It is a super-2 number, since 2×31345113389² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31345113329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672556694 + 15672556695.

It is an arithmetic number, because the mean of its divisors is an integer number (15672556695).

Almost surely, 2^31345113389 is an apocalyptic number.

It is an amenable number.

31345113389 is a deficient number, since it is larger than the sum of its proper divisors (1).

31345113389 is an equidigital number, since it uses as much as digits as its factorization.

31345113389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The spelling of 31345113389 in words is "thirty-one billion, three hundred forty-five million, one hundred thirteen thousand, three hundred eighty-nine".