31534589 has 2 divisors, whose sum is σ = 31534590. Its totient is φ = 31534588.

The previous prime is 31534561. The next prime is 31534597. The reversal of 31534589 is 98543513.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30415225 + 1119364 = 5515^2 + 1058^2 .

It is a cyclic number.

It is not a de Polignac number, because 31534589 - 2⁸ = 31534333 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31530589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15767294 + 15767295.

It is an arithmetic number, because the mean of its divisors is an integer number (15767295).

Almost surely, 2^31534589 is an apocalyptic number.

It is an amenable number.

31534589 is a deficient number, since it is larger than the sum of its proper divisors (1).

31534589 is an equidigital number, since it uses as much as digits as its factorization.

31534589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 31534589 is about 5615.5666677549. The cubic root of 31534589 is about 315.9335336626.

It can be divided in two parts, 31534 and 589, that added together give a palindrome (32123).

The spelling of 31534589 in words is "thirty-one million, five hundred thirty-four thousand, five hundred eighty-nine".