165894539 has 2 divisors, whose sum is σ = 165894540. Its totient is φ = 165894538.

The previous prime is 165894527. The next prime is 165894557. The reversal of 165894539 is 935498561.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165894539 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165894139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82947269 + 82947270.

It is an arithmetic number, because the mean of its divisors is an integer number (82947270).

Almost surely, 2^165894539 is an apocalyptic number.

165894539 is a deficient number, since it is larger than the sum of its proper divisors (1).

165894539 is an equidigital number, since it uses as much as digits as its factorization.

165894539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 50.

The square root of 165894539 is about 12880.0053959616. The cubic root of 165894539 is about 549.4700559357.

The spelling of 165894539 in words is "one hundred sixty-five million, eight hundred ninety-four thousand, five hundred thirty-nine".