904154561 has 2 divisors, whose sum is σ = 904154562. Its totient is φ = 904154560.

The previous prime is 904154543. The next prime is 904154659. The reversal of 904154561 is 165451409.

904154561 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., 517835536 + 386319025 = 22756^2 + 19655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-904154561 is a prime.

It is not a weakly prime, because it can be changed into another prime (904154161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452077280 + 452077281.

It is an arithmetic number, because the mean of its divisors is an integer number (452077281).

Almost surely, 2^904154561 is an apocalyptic number.

It is an amenable number.

904154561 is a deficient number, since it is larger than the sum of its proper divisors (1).

904154561 is an equidigital number, since it uses as much as digits as its factorization.

904154561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 904154561 is about 30069.1629580871. The cubic root of 904154561 is about 966.9727283864.

The spelling of 904154561 in words is "nine hundred four million, one hundred fifty-four thousand, five hundred sixty-one".