904425169 has 2 divisors, whose sum is σ = 904425170. Its totient is φ = 904425168.

The previous prime is 904425167. The next prime is 904425229. The reversal of 904425169 is 961524409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 469285569 + 435139600 = 21663^2 + 20860^2 .

It is an emirp because it is prime and its reverse (961524409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 904425169 - 2¹ = 904425167 is a prime.

It is a super-2 number, since 2×904425169² = 1635969772641357122, which contains 22 as substring.

Together with 904425167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (904425167) 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, 452212584 + 452212585.

It is an arithmetic number, because the mean of its divisors is an integer number (452212585).

Almost surely, 2^904425169 is an apocalyptic number.

It is an amenable number.

904425169 is a deficient number, since it is larger than the sum of its proper divisors (1).

904425169 is an equidigital number, since it uses as much as digits as its factorization.

904425169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 904425169 is about 30073.6623808940. The cubic root of 904425169 is about 967.0691884632.

The spelling of 904425169 in words is "nine hundred four million, four hundred twenty-five thousand, one hundred sixty-nine".