165047539 has 2 divisors, whose sum is σ = 165047540. Its totient is φ = 165047538.

The previous prime is 165047527. The next prime is 165047557. The reversal of 165047539 is 935740561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165047539 - 2⁹ = 165047027 is a prime.

It is not a weakly prime, because it can be changed into another prime (165047569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82523769 + 82523770.

It is an arithmetic number, because the mean of its divisors is an integer number (82523770).

Almost surely, 2^165047539 is an apocalyptic number.

165047539 is a deficient number, since it is larger than the sum of its proper divisors (1).

165047539 is an equidigital number, since it uses as much as digits as its factorization.

165047539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 165047539 is about 12847.0828984638. The cubic root of 165047539 is about 548.5333253809.

The spelling of 165047539 in words is "one hundred sixty-five million, forty-seven thousand, five hundred thirty-nine".