165929399 has 2 divisors, whose sum is σ = 165929400. Its totient is φ = 165929398.

The previous prime is 165929381. The next prime is 165929459. The reversal of 165929399 is 993929561.

It is a weak prime.

It is an emirp because it is prime and its reverse (993929561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165929399 - 2²⁰ = 164880823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165929399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165929359) 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, 82964699 + 82964700.

It is an arithmetic number, because the mean of its divisors is an integer number (82964700).

Almost surely, 2^165929399 is an apocalyptic number.

165929399 is a deficient number, since it is larger than the sum of its proper divisors (1).

165929399 is an equidigital number, since it uses as much as digits as its factorization.

165929399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1180980, while the sum is 53.

The square root of 165929399 is about 12881.3585851804. The cubic root of 165929399 is about 549.5085405954.

The spelling of 165929399 in words is "one hundred sixty-five million, nine hundred twenty-nine thousand, three hundred ninety-nine".