904040257 has 2 divisors, whose sum is σ = 904040258. Its totient is φ = 904040256.

The previous prime is 904040243. The next prime is 904040281. The reversal of 904040257 is 752040409.

904040257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 797723536 + 106316721 = 28244^2 + 10311^2 .

It is a cyclic number.

It is not a de Polignac number, because 904040257 - 2²³ = 895651649 is a prime.

It is not a weakly prime, because it can be changed into another prime (904040237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452020128 + 452020129.

It is an arithmetic number, because the mean of its divisors is an integer number (452020129).

Almost surely, 2^904040257 is an apocalyptic number.

It is an amenable number.

904040257 is a deficient number, since it is larger than the sum of its proper divisors (1).

904040257 is an equidigital number, since it uses as much as digits as its factorization.

904040257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 904040257 is about 30067.2622132445. The cubic root of 904040257 is about 966.9319781602.

The spelling of 904040257 in words is "nine hundred four million, forty thousand, two hundred fifty-seven".