97531589 has 2 divisors, whose sum is σ = 97531590. Its totient is φ = 97531588.

The previous prime is 97531571. The next prime is 97531613. The reversal of 97531589 is 98513579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82047364 + 15484225 = 9058^2 + 3935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97531589 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97531529) 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 as a sum of consecutive naturals, namely, 48765794 + 48765795.

It is an arithmetic number, because the mean of its divisors is an integer number (48765795).

Almost surely, 2^97531589 is an apocalyptic number.

It is an amenable number.

97531589 is a deficient number, since it is larger than the sum of its proper divisors (1).

97531589 is an equidigital number, since it uses as much as digits as its factorization.

97531589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 47.

The square root of 97531589 is about 9875.8082707189. The cubic root of 97531589 is about 460.3079050712.

The spelling of 97531589 in words is "ninety-seven million, five hundred thirty-one thousand, five hundred eighty-nine".