31088489 has 2 divisors, whose sum is σ = 31088490. Its totient is φ = 31088488.

The previous prime is 31088471. The next prime is 31088509. The reversal of 31088489 is 98488013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29106025 + 1982464 = 5395^2 + 1408^2 .

It is a cyclic number.

It is not a de Polignac number, because 31088489 - 2²⁰ = 30039913 is a prime.

It is not a weakly prime, because it can be changed into another prime (31088459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15544244 + 15544245.

It is an arithmetic number, because the mean of its divisors is an integer number (15544245).

Almost surely, 2^31088489 is an apocalyptic number.

It is an amenable number.

31088489 is a deficient number, since it is larger than the sum of its proper divisors (1).

31088489 is an equidigital number, since it uses as much as digits as its factorization.

31088489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 31088489 is about 5575.7052468724. The cubic root of 31088489 is about 314.4366819671.

The spelling of 31088489 in words is "thirty-one million, eighty-eight thousand, four hundred eighty-nine".