404121589 has 2 divisors, whose sum is σ = 404121590. Its totient is φ = 404121588.

The previous prime is 404121587. The next prime is 404121607. The reversal of 404121589 is 985121404.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317445489 + 86676100 = 17817^2 + 9310^2 .

It is a cyclic number.

It is not a de Polignac number, because 404121589 - 2¹ = 404121587 is a prime.

Together with 404121587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404121581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202060794 + 202060795.

It is an arithmetic number, because the mean of its divisors is an integer number (202060795).

Almost surely, 2^404121589 is an apocalyptic number.

It is an amenable number.

404121589 is a deficient number, since it is larger than the sum of its proper divisors (1).

404121589 is an equidigital number, since it uses as much as digits as its factorization.

404121589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 404121589 is about 20102.7756541230. The cubic root of 404121589 is about 739.3283344193.

The spelling of 404121589 in words is "four hundred four million, one hundred twenty-one thousand, five hundred eighty-nine".