404990441 has 2 divisors, whose sum is σ = 404990442. Its totient is φ = 404990440.

The previous prime is 404990389. The next prime is 404990459. The reversal of 404990441 is 144099404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263380441 + 141610000 = 16229^2 + 11900^2 .

It is a cyclic number.

It is not a de Polignac number, because 404990441 - 2¹⁴ = 404974057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (404990471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202495220 + 202495221.

It is an arithmetic number, because the mean of its divisors is an integer number (202495221).

Almost surely, 2^404990441 is an apocalyptic number.

It is an amenable number.

404990441 is a deficient number, since it is larger than the sum of its proper divisors (1).

404990441 is an equidigital number, since it uses as much as digits as its factorization.

404990441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 404990441 is about 20124.3743008323. The cubic root of 404990441 is about 739.8578013839.

The spelling of 404990441 in words is "four hundred four million, nine hundred ninety thousand, four hundred forty-one".