31608040787 has 2 divisors, whose sum is σ = 31608040788. Its totient is φ = 31608040786.

The previous prime is 31608040757. The next prime is 31608040861. The reversal of 31608040787 is 78704080613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31608040787 - 2⁸ = 31608040531 is a prime.

It is not a weakly prime, because it can be changed into another prime (31608040747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15804020393 + 15804020394.

It is an arithmetic number, because the mean of its divisors is an integer number (15804020394).

Almost surely, 2^31608040787 is an apocalyptic number.

31608040787 is a deficient number, since it is larger than the sum of its proper divisors (1).

31608040787 is an equidigital number, since it uses as much as digits as its factorization.

31608040787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 31608040787 in words is "thirty-one billion, six hundred eight million, forty thousand, seven hundred eighty-seven".