31162489 has 4 divisors (see below), whose sum is σ = 32802640. Its totient is φ = 29522340.

The previous prime is 31162477. The next prime is 31162499. The reversal of 31162489 is 98426113.

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.

It is a cyclic number.

It is not a de Polignac number, because 31162489 - 2⁷ = 31162361 is a prime.

It is a super-2 number, since 2×31162489² = 1942201441350242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31162499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820047 + ... + 820084.

It is an arithmetic number, because the mean of its divisors is an integer number (8200660).

Almost surely, 2^31162489 is an apocalyptic number.

It is an amenable number.

31162489 is a deficient number, since it is larger than the sum of its proper divisors (1640151).

31162489 is a wasteful number, since it uses less digits than its factorization.

31162489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640150.

The product of its digits is 10368, while the sum is 34.

The square root of 31162489 is about 5582.3372345282. The cubic root of 31162489 is about 314.6859690581.

The spelling of 31162489 in words is "thirty-one million, one hundred sixty-two thousand, four hundred eighty-nine".