31420076491 has 2 divisors, whose sum is σ = 31420076492. Its totient is φ = 31420076490.

The previous prime is 31420076453. The next prime is 31420076521. The reversal of 31420076491 is 19467002413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31420076491 - 2³³ = 22830141899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31420076491.

It is not a weakly prime, because it can be changed into another prime (31420076411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710038245 + 15710038246.

It is an arithmetic number, because the mean of its divisors is an integer number (15710038246).

Almost surely, 2^31420076491 is an apocalyptic number.

31420076491 is a deficient number, since it is larger than the sum of its proper divisors (1).

31420076491 is an equidigital number, since it uses as much as digits as its factorization.

31420076491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 31420076491 in words is "thirty-one billion, four hundred twenty million, seventy-six thousand, four hundred ninety-one".