904363409 has 4 divisors (see below), whose sum is σ = 904423716. Its totient is φ = 904303104.

The previous prime is 904363379. The next prime is 904363451.

904363409 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 858665809 + 45697600 = 29303^2 + 6760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-904363409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (904363309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11777 + ... + 44129.

It is an arithmetic number, because the mean of its divisors is an integer number (226105929).

Almost surely, 2^904363409 is an apocalyptic number.

It is an amenable number.

904363409 is a deficient number, since it is larger than the sum of its proper divisors (60307).

904363409 is a wasteful number, since it uses less digits than its factorization.

904363409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60306.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 904363409 is about 30072.6355512782. The cubic root of 904363409 is about 967.0471753825.

The spelling of 904363409 in words is "nine hundred four million, three hundred sixty-three thousand, four hundred nine".