31788928723 has 2 divisors, whose sum is σ = 31788928724. Its totient is φ = 31788928722.

The previous prime is 31788928697. The next prime is 31788928739. The reversal of 31788928723 is 32782988713.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31788928723 - 2¹³ = 31788920531 is a prime.

It is not a weakly prime, because it can be changed into another prime (31788928763) 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, 15894464361 + 15894464362.

It is an arithmetic number, because the mean of its divisors is an integer number (15894464362).

Almost surely, 2^31788928723 is an apocalyptic number.

31788928723 is a deficient number, since it is larger than the sum of its proper divisors (1).

31788928723 is an equidigital number, since it uses as much as digits as its factorization.

31788928723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 58.

The spelling of 31788928723 in words is "thirty-one billion, seven hundred eighty-eight million, nine hundred twenty-eight thousand, seven hundred twenty-three".