85164539 has 2 divisors, whose sum is σ = 85164540. Its totient is φ = 85164538.

The previous prime is 85164523. The next prime is 85164559. The reversal of 85164539 is 93546158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85164539 - 2⁴ = 85164523 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 85164496 and 85164505.

It is not a weakly prime, because it can be changed into another prime (85164559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42582269 + 42582270.

It is an arithmetic number, because the mean of its divisors is an integer number (42582270).

Almost surely, 2^85164539 is an apocalyptic number.

85164539 is a deficient number, since it is larger than the sum of its proper divisors (1).

85164539 is an equidigital number, since it uses as much as digits as its factorization.

85164539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 41.

The square root of 85164539 is about 9228.4635232524. The cubic root of 85164539 is about 439.9664902166.

The spelling of 85164539 in words is "eighty-five million, one hundred sixty-four thousand, five hundred thirty-nine".