31000817339 has 2 divisors, whose sum is σ = 31000817340. Its totient is φ = 31000817338.

The previous prime is 31000817303. The next prime is 31000817383. The reversal of 31000817339 is 93371800013.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31000817339 is a prime.

It is a super-2 number, since 2×31000817339² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 31000817299 and 31000817308.

It is not a weakly prime, because it can be changed into another prime (31000811339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500408669 + 15500408670.

It is an arithmetic number, because the mean of its divisors is an integer number (15500408670).

Almost surely, 2^31000817339 is an apocalyptic number.

31000817339 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000817339 is an equidigital number, since it uses as much as digits as its factorization.

31000817339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The spelling of 31000817339 in words is "thirty-one billion, eight hundred seventeen thousand, three hundred thirty-nine".