86973539 has 2 divisors, whose sum is σ = 86973540. Its totient is φ = 86973538.

The previous prime is 86973521. The next prime is 86973589. The reversal of 86973539 is 93537968.

It is an a-pointer prime, because the next prime (86973589) can be obtained adding 86973539 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86973539 - 2²⁴ = 70196323 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (86973589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43486769 + 43486770.

It is an arithmetic number, because the mean of its divisors is an integer number (43486770).

Almost surely, 2^86973539 is an apocalyptic number.

86973539 is a deficient number, since it is larger than the sum of its proper divisors (1).

86973539 is an equidigital number, since it uses as much as digits as its factorization.

86973539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 50.

The square root of 86973539 is about 9325.9604867274. The cubic root of 86973539 is about 443.0598342612.

The spelling of 86973539 in words is "eighty-six million, nine hundred seventy-three thousand, five hundred thirty-nine".