900169 has 2 divisors, whose sum is σ = 900170. Its totient is φ = 900168.

The previous prime is 900161. The next prime is 900187. The reversal of 900169 is 961009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 374544 = 725^2 + 612^2 .

It is a cyclic number.

It is not a de Polignac number, because 900169 - 2³ = 900161 is a prime.

It is a super-2 number, since 2×900169² = 1620608457122, which contains 22 as substring.

900169 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (900161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450084 + 450085.

It is an arithmetic number, because the mean of its divisors is an integer number (450085).

2⁹⁰⁰¹⁶⁹ is an apocalyptic number.

It is an amenable number.

900169 is a deficient number, since it is larger than the sum of its proper divisors (1).

900169 is an equidigital number, since it uses as much as digits as its factorization.

900169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 900169 is about 948.7723646903. The cubic root of 900169 is about 96.5549813307.

It can be divided in two parts, 900 and 169, that multiplied together give a square (152100 = 390²).

The spelling of 900169 in words is "nine hundred thousand, one hundred sixty-nine".