904008641 has 2 divisors, whose sum is σ = 904008642. Its totient is φ = 904008640.

The previous prime is 904008587. The next prime is 904008661. The reversal of 904008641 is 146800409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 491065600 + 412943041 = 22160^2 + 20321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-904008641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 904008598 and 904008607.

It is not a weakly prime, because it can be changed into another prime (904008661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452004320 + 452004321.

It is an arithmetic number, because the mean of its divisors is an integer number (452004321).

Almost surely, 2^904008641 is an apocalyptic number.

It is an amenable number.

904008641 is a deficient number, since it is larger than the sum of its proper divisors (1).

904008641 is an equidigital number, since it uses as much as digits as its factorization.

904008641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 904008641 is about 30066.7364540949. The cubic root of 904008641 is about 966.9207062146.

The spelling of 904008641 in words is "nine hundred four million, eight thousand, six hundred forty-one".