165004999 has 2 divisors, whose sum is σ = 165005000. Its totient is φ = 165004998.

The previous prime is 165004997. The next prime is 165005017. The reversal of 165004999 is 999400561.

It is a weak prime.

It is an emirp because it is prime and its reverse (999400561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165004999 - 2¹ = 165004997 is a prime.

Together with 165004997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165004991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82502499 + 82502500.

It is an arithmetic number, because the mean of its divisors is an integer number (82502500).

Almost surely, 2^165004999 is an apocalyptic number.

165004999 is a deficient number, since it is larger than the sum of its proper divisors (1).

165004999 is an equidigital number, since it uses as much as digits as its factorization.

165004999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 165004999 is about 12845.4271630024. The cubic root of 165004999 is about 548.4861942879.

The spelling of 165004999 in words is "one hundred sixty-five million, four thousand, nine hundred ninety-nine".