31904334487 has 2 divisors, whose sum is σ = 31904334488. Its totient is φ = 31904334486.

The previous prime is 31904334463. The next prime is 31904334509. The reversal of 31904334487 is 78443340913.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31904334487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31904334437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15952167243 + 15952167244.

It is an arithmetic number, because the mean of its divisors is an integer number (15952167244).

Almost surely, 2^31904334487 is an apocalyptic number.

31904334487 is a deficient number, since it is larger than the sum of its proper divisors (1).

31904334487 is an equidigital number, since it uses as much as digits as its factorization.

31904334487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 31904334487 in words is "thirty-one billion, nine hundred four million, three hundred thirty-four thousand, four hundred eighty-seven".