31249027946889 has 9 divisors (see below), whose sum is σ = 45137509035879. Its totient is φ = 20832674117760.

The previous prime is 31249027946881. The next prime is 31249027946897. The reversal of 31249027946889 is 98864972094213.

The square root of 31249027946889 is 5590083.

It is a perfect power (a square), and thus also a powerful number.

31249027946889 is a `hidden beast` number, since 3 + 1 + 2 + 4 + 90 + 2 + 79 + 468 + 8 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (31249027946881) and next prime (31249027946897).

It can be written as a sum of positive squares in only one way, i.e., 1211613137289 + 30037414809600 = 1100733^2 + 5480640^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 31249027946889 - 2³ = 31249027946881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31249027946881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15838569 + ... + 17701929.

Almost surely, 2^{31249027946889} is an apocalyptic number.

31249027946889 is the 5590083-rd square number.

31249027946889 is the 2795042-nd centered octagonal number.

It is an amenable number.

31249027946889 is a deficient number, since it is larger than the sum of its proper divisors (13888481088990).

31249027946889 is an frugal number, since it uses more digits than its factorization.

31249027946889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726728 (or 1863364 counting only the distinct ones).

The product of its (nonzero) digits is 376233984, while the sum is 72.

The spelling of 31249027946889 in words is "thirty-one trillion, two hundred forty-nine billion, twenty-seven million, nine hundred forty-six thousand, eight hundred eighty-nine".