904603681 has 2 divisors, whose sum is σ = 904603682. Its totient is φ = 904603680.

The previous prime is 904603673. The next prime is 904603717. The reversal of 904603681 is 186306409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 898800400 + 5803281 = 29980^2 + 2409^2 .

It is a cyclic number.

It is not a de Polignac number, because 904603681 - 2³ = 904603673 is a prime.

It is a super-2 number, since 2×904603681² = 1636615639357499522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 904603681.

It is not a weakly prime, because it can be changed into another prime (904603181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452301840 + 452301841.

It is an arithmetic number, because the mean of its divisors is an integer number (452301841).

Almost surely, 2^904603681 is an apocalyptic number.

It is an amenable number.

904603681 is a deficient number, since it is larger than the sum of its proper divisors (1).

904603681 is an equidigital number, since it uses as much as digits as its factorization.

904603681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 904603681 is about 30076.6301470095. The cubic root of 904603681 is about 967.1328097570.

The spelling of 904603681 in words is "nine hundred four million, six hundred three thousand, six hundred eighty-one".