165540929 has 2 divisors, whose sum is σ = 165540930. Its totient is φ = 165540928.

The previous prime is 165540871. The next prime is 165540941. The reversal of 165540929 is 929045561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133448704 + 32092225 = 11552^2 + 5665^2 .

It is a cyclic number.

It is not a de Polignac number, because 165540929 - 2²⁰ = 164492353 is a prime.

It is a Chen prime.

It is equal to p_9267458 and since 165540929 and 9267458 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (165540829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82770464 + 82770465.

It is an arithmetic number, because the mean of its divisors is an integer number (82770465).

Almost surely, 2^165540929 is an apocalyptic number.

It is an amenable number.

165540929 is a deficient number, since it is larger than the sum of its proper divisors (1).

165540929 is an equidigital number, since it uses as much as digits as its factorization.

165540929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 165540929 is about 12866.2709826896. The cubic root of 165540929 is about 549.0793733522.

The spelling of 165540929 in words is "one hundred sixty-five million, five hundred forty thousand, nine hundred twenty-nine".