31024989 has 6 divisors (see below), whose sum is σ = 44813886. Its totient is φ = 20683320.

The previous prime is 31024979. The next prime is 31024991. The reversal of 31024989 is 98942013.

It can be written as a sum of positive squares in only one way, i.e., 23912100 + 7112889 = 4890^2 + 2667^2 .

It is not a de Polignac number, because 31024989 - 2¹¹ = 31022941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31024909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1723602 + ... + 1723619.

It is an arithmetic number, because the mean of its divisors is an integer number (7468981).

Almost surely, 2^31024989 is an apocalyptic number.

It is an amenable number.

31024989 is a deficient number, since it is larger than the sum of its proper divisors (13788897).

31024989 is a wasteful number, since it uses less digits than its factorization.

31024989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3447227 (or 3447224 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 31024989 is about 5570.0079892223. The cubic root of 31024989 is about 314.2224511291. Note that the first 3 decimals are identical.

The spelling of 31024989 in words is "thirty-one million, twenty-four thousand, nine hundred eighty-nine".