165116009 has 2 divisors, whose sum is σ = 165116010. Its totient is φ = 165116008.

The previous prime is 165115991. The next prime is 165116027. The reversal of 165116009 is 900611561.

It is a balanced prime because it is at equal distance from previous prime (165115991) and next prime (165116027).

It can be written as a sum of positive squares in only one way, i.e., 160098409 + 5017600 = 12653^2 + 2240^2 .

It is a cyclic number.

It is not a de Polignac number, because 165116009 - 2²⁰ = 164067433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165116059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82558004 + 82558005.

It is an arithmetic number, because the mean of its divisors is an integer number (82558005).

Almost surely, 2^165116009 is an apocalyptic number.

It is an amenable number.

165116009 is a deficient number, since it is larger than the sum of its proper divisors (1).

165116009 is an equidigital number, since it uses as much as digits as its factorization.

165116009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 165116009 is about 12849.7474294244. The cubic root of 165116009 is about 548.6091679423.

The spelling of 165116009 in words is "one hundred sixty-five million, one hundred sixteen thousand, nine".