904493609 has 2 divisors, whose sum is σ = 904493610. Its totient is φ = 904493608.

The previous prime is 904493593. The next prime is 904493617. The reversal of 904493609 is 906394409.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 889709584 + 14784025 = 29828^2 + 3845^2 .

It is a cyclic number.

It is not a de Polignac number, because 904493609 - 2⁴ = 904493593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 904493609.

It is not a weakly prime, because it can be changed into another prime (904492609) 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, 452246804 + 452246805.

It is an arithmetic number, because the mean of its divisors is an integer number (452246805).

Almost surely, 2^904493609 is an apocalyptic number.

It is an amenable number.

904493609 is a deficient number, since it is larger than the sum of its proper divisors (1).

904493609 is an equidigital number, since it uses as much as digits as its factorization.

904493609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 904493609 is about 30074.8002320880. The cubic root of 904493609 is about 967.0935813218.

The spelling of 904493609 in words is "nine hundred four million, four hundred ninety-three thousand, six hundred nine".