86973589 has 2 divisors, whose sum is σ = 86973590. Its totient is φ = 86973588.

The previous prime is 86973539. The next prime is 86973599. The reversal of 86973589 is 98537968.

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., 77000625 + 9972964 = 8775^2 + 3158^2 .

It is a cyclic number.

It is not a de Polignac number, because 86973589 - 2¹⁷ = 86842517 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 (86973539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43486794 + 43486795.

It is an arithmetic number, because the mean of its divisors is an integer number (43486795).

Almost surely, 2^86973589 is an apocalyptic number.

It is an amenable number.

86973589 is a deficient number, since it is larger than the sum of its proper divisors (1).

86973589 is an equidigital number, since it uses as much as digits as its factorization.

86973589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 55.

The square root of 86973589 is about 9325.9631674160. The cubic root of 86973589 is about 443.0599191644.

The spelling of 86973589 in words is "eighty-six million, nine hundred seventy-three thousand, five hundred eighty-nine".