31990590859 has 2 divisors, whose sum is σ = 31990590860. Its totient is φ = 31990590858.

The previous prime is 31990590829. The next prime is 31990590949. The reversal of 31990590859 is 95809509913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31990590859 - 2⁹ = 31990590347 is a prime.

It is not a weakly prime, because it can be changed into another prime (31990590829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15995295429 + 15995295430.

It is an arithmetic number, because the mean of its divisors is an integer number (15995295430).

Almost surely, 2^31990590859 is an apocalyptic number.

31990590859 is a deficient number, since it is larger than the sum of its proper divisors (1).

31990590859 is an equidigital number, since it uses as much as digits as its factorization.

31990590859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3936600, while the sum is 58.

The spelling of 31990590859 in words is "thirty-one billion, nine hundred ninety million, five hundred ninety thousand, eight hundred fifty-nine".