31004202989 has 2 divisors, whose sum is σ = 31004202990. Its totient is φ = 31004202988.

The previous prime is 31004202979. The next prime is 31004203019. The reversal of 31004202989 is 98920240013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23736640489 + 7267562500 = 154067^2 + 85250^2 .

It is a cyclic number.

It is not a de Polignac number, because 31004202989 - 2²⁴ = 30987425773 is a prime.

It is a super-2 number, since 2×31004202989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31004202979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15502101494 + 15502101495.

It is an arithmetic number, because the mean of its divisors is an integer number (15502101495).

Almost surely, 2^31004202989 is an apocalyptic number.

It is an amenable number.

31004202989 is a deficient number, since it is larger than the sum of its proper divisors (1).

31004202989 is an equidigital number, since it uses as much as digits as its factorization.

31004202989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 31004202989 in words is "thirty-one billion, four million, two hundred two thousand, nine hundred eighty-nine".