31089489 has 4 divisors (see below), whose sum is σ = 41452656. Its totient is φ = 20726324.

The previous prime is 31089449. The next prime is 31089503. The reversal of 31089489 is 98498013.

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 31089489 - 2¹² = 31085393 is a prime.

It is a super-2 number, since 2×31089489² = 1933112652562242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31089489.

It is not an unprimeable number, because it can be changed into a prime (31089449) 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, 5181579 + ... + 5181584.

It is an arithmetic number, because the mean of its divisors is an integer number (10363164).

Almost surely, 2^31089489 is an apocalyptic number.

It is an amenable number.

31089489 is a deficient number, since it is larger than the sum of its proper divisors (10363167).

31089489 is a wasteful number, since it uses less digits than its factorization.

31089489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10363166.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 31089489 is about 5575.7949209059. The cubic root of 31089489 is about 314.4400533469.

The spelling of 31089489 in words is "thirty-one million, eighty-nine thousand, four hundred eighty-nine".