909165449 has 2 divisors, whose sum is σ = 909165450. Its totient is φ = 909165448.

The previous prime is 909165421. The next prime is 909165461. The reversal of 909165449 is 944561909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 894010000 + 15155449 = 29900^2 + 3893^2 .

It is a cyclic number.

It is not a de Polignac number, because 909165449 - 2²⁰ = 908116873 is a prime.

It is a Chen prime.

It is equal to p_46453889 and since 909165449 and 46453889 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 (909165419) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454582724 + 454582725.

It is an arithmetic number, because the mean of its divisors is an integer number (454582725).

Almost surely, 2^909165449 is an apocalyptic number.

It is an amenable number.

909165449 is a deficient number, since it is larger than the sum of its proper divisors (1).

909165449 is an equidigital number, since it uses as much as digits as its factorization.

909165449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 909165449 is about 30152.3705369910. The cubic root of 909165449 is about 968.7557820591.

The spelling of 909165449 in words is "nine hundred nine million, one hundred sixty-five thousand, four hundred forty-nine".