31964489 has 4 divisors (see below), whose sum is σ = 32506320. Its totient is φ = 31422660.

The previous prime is 31964483. The next prime is 31964501. The reversal of 31964489 is 98446913.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98446913 = 8641 ⋅11393.

It is a cyclic number.

It is not a de Polignac number, because 31964489 - 2⁴ = 31964473 is a prime.

It is a super-2 number, since 2×31964489² = 2043457114062242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31964483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270827 + ... + 270944.

It is an arithmetic number, because the mean of its divisors is an integer number (8126580).

Almost surely, 2^31964489 is an apocalyptic number.

It is an amenable number.

31964489 is a deficient number, since it is larger than the sum of its proper divisors (541831).

31964489 is an equidigital number, since it uses as much as digits as its factorization.

31964489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541830.

The product of its digits is 186624, while the sum is 44.

The square root of 31964489 is about 5653.7146196107. The cubic root of 31964489 is about 317.3627290117.

The spelling of 31964489 in words is "thirty-one million, nine hundred sixty-four thousand, four hundred eighty-nine".