31090911793 has 2 divisors, whose sum is σ = 31090911794. Its totient is φ = 31090911792.

The previous prime is 31090911727. The next prime is 31090911829. The reversal of 31090911793 is 39711909013.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21436473744 + 9654438049 = 146412^2 + 98257^2 .

It is a cyclic number.

It is not a de Polignac number, because 31090911793 - 2¹³ = 31090903601 is a prime.

It is a super-2 number, since 2×31090911793² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31090911893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15545455896 + 15545455897.

It is an arithmetic number, because the mean of its divisors is an integer number (15545455897).

Almost surely, 2^31090911793 is an apocalyptic number.

It is an amenable number.

31090911793 is a deficient number, since it is larger than the sum of its proper divisors (1).

31090911793 is an equidigital number, since it uses as much as digits as its factorization.

31090911793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 43.

The spelling of 31090911793 in words is "thirty-one billion, ninety million, nine hundred eleven thousand, seven hundred ninety-three".