155004169 has 2 divisors, whose sum is σ = 155004170. Its totient is φ = 155004168.

The previous prime is 155004139. The next prime is 155004191. The reversal of 155004169 is 961400551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154082569 + 921600 = 12413^2 + 960^2 .

It is a cyclic number.

It is not a de Polignac number, because 155004169 - 2²⁵ = 121449737 is a prime.

It is a super-2 number, since 2×155004169² = 48052584814761122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155004169.

It is not a weakly prime, because it can be changed into another prime (155004139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77502084 + 77502085.

It is an arithmetic number, because the mean of its divisors is an integer number (77502085).

Almost surely, 2^155004169 is an apocalyptic number.

It is an amenable number.

155004169 is a deficient number, since it is larger than the sum of its proper divisors (1).

155004169 is an equidigital number, since it uses as much as digits as its factorization.

155004169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 155004169 is about 12450.0670279320. The cubic root of 155004169 is about 537.1733514849.

The spelling of 155004169 in words is "one hundred fifty-five million, four thousand, one hundred sixty-nine".