31614471989 has 2 divisors, whose sum is σ = 31614471990. Its totient is φ = 31614471988.

The previous prime is 31614471983. The next prime is 31614472033. The reversal of 31614471989 is 98917441613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16501457764 + 15113014225 = 128458^2 + 122935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31614471989 is a prime.

It is a super-2 number, since 2×31614471989² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31614471989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31614471983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15807235994 + 15807235995.

It is an arithmetic number, because the mean of its divisors is an integer number (15807235995).

Almost surely, 2^31614471989 is an apocalyptic number.

It is an amenable number.

31614471989 is a deficient number, since it is larger than the sum of its proper divisors (1).

31614471989 is an equidigital number, since it uses as much as digits as its factorization.

31614471989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 53.

The spelling of 31614471989 in words is "thirty-one billion, six hundred fourteen million, four hundred seventy-one thousand, nine hundred eighty-nine".