31264489 has 2 divisors, whose sum is σ = 31264490. Its totient is φ = 31264488.

The previous prime is 31264477. The next prime is 31264507. The reversal of 31264489 is 98446213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27123264 + 4141225 = 5208^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 31264489 - 2¹⁵ = 31231721 is a prime.

It is a super-2 number, since 2×31264489² = 1954936544862242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31264789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15632244 + 15632245.

It is an arithmetic number, because the mean of its divisors is an integer number (15632245).

Almost surely, 2^31264489 is an apocalyptic number.

It is an amenable number.

31264489 is a deficient number, since it is larger than the sum of its proper divisors (1).

31264489 is an equidigital number, since it uses as much as digits as its factorization.

31264489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 31264489 is about 5591.4657291268. The cubic root of 31264489 is about 315.0289349418.

The spelling of 31264489 in words is "thirty-one million, two hundred sixty-four thousand, four hundred eighty-nine".