31768489667 has 2 divisors, whose sum is σ = 31768489668. Its totient is φ = 31768489666.

The previous prime is 31768489631. The next prime is 31768489681. The reversal of 31768489667 is 76698486713.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31768489667 - 2¹⁰ = 31768488643 is a prime.

It is not a weakly prime, because it can be changed into another prime (31768482667) 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, 15884244833 + 15884244834.

It is an arithmetic number, because the mean of its divisors is an integer number (15884244834).

Almost surely, 2^31768489667 is an apocalyptic number.

31768489667 is a deficient number, since it is larger than the sum of its proper divisors (1).

31768489667 is an equidigital number, since it uses as much as digits as its factorization.

31768489667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73156608, while the sum is 65.

The spelling of 31768489667 in words is "thirty-one billion, seven hundred sixty-eight million, four hundred eighty-nine thousand, six hundred sixty-seven".