31047304439 has 2 divisors, whose sum is σ = 31047304440. Its totient is φ = 31047304438.

The previous prime is 31047304433. The next prime is 31047304451. The reversal of 31047304439 is 93440374013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31047304439 - 2¹² = 31047300343 is a prime.

It is a super-2 number, since 2×31047304439² (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 (31047304433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15523652219 + 15523652220.

It is an arithmetic number, because the mean of its divisors is an integer number (15523652220).

Almost surely, 2^31047304439 is an apocalyptic number.

31047304439 is a deficient number, since it is larger than the sum of its proper divisors (1).

31047304439 is an equidigital number, since it uses as much as digits as its factorization.

31047304439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 38.

The spelling of 31047304439 in words is "thirty-one billion, forty-seven million, three hundred four thousand, four hundred thirty-nine".