31020078923 has 2 divisors, whose sum is σ = 31020078924. Its totient is φ = 31020078922.

The previous prime is 31020078899. The next prime is 31020078941. The reversal of 31020078923 is 32987002013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31020078923 - 2¹⁰ = 31020077899 is a prime.

It is not a weakly prime, because it can be changed into another prime (31020074923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510039461 + 15510039462.

It is an arithmetic number, because the mean of its divisors is an integer number (15510039462).

Almost surely, 2^31020078923 is an apocalyptic number.

31020078923 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020078923 is an equidigital number, since it uses as much as digits as its factorization.

31020078923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 31020078923 in words is "thirty-one billion, twenty million, seventy-eight thousand, nine hundred twenty-three".