404381489 has 2 divisors, whose sum is σ = 404381490. Its totient is φ = 404381488.

The previous prime is 404381459. The next prime is 404381491. The reversal of 404381489 is 984183404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 349503025 + 54878464 = 18695^2 + 7408^2 .

It is a cyclic number.

It is not a de Polignac number, because 404381489 - 2⁸ = 404381233 is a prime.

Together with 404381491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (404381459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202190744 + 202190745.

It is an arithmetic number, because the mean of its divisors is an integer number (202190745).

Almost surely, 2^404381489 is an apocalyptic number.

It is an amenable number.

404381489 is a deficient number, since it is larger than the sum of its proper divisors (1).

404381489 is an equidigital number, since it uses as much as digits as its factorization.

404381489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 404381489 is about 20109.2388965868. The cubic root of 404381489 is about 739.4867935413.

The spelling of 404381489 in words is "four hundred four million, three hundred eighty-one thousand, four hundred eighty-nine".