404121539 has 2 divisors, whose sum is σ = 404121540. Its totient is φ = 404121538.

The previous prime is 404121521. The next prime is 404121581. The reversal of 404121539 is 935121404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404121539 - 2²⁰ = 403072963 is a prime.

It is not a weakly prime, because it can be changed into another prime (404121589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202060769 + 202060770.

It is an arithmetic number, because the mean of its divisors is an integer number (202060770).

Almost surely, 2^404121539 is an apocalyptic number.

404121539 is a deficient number, since it is larger than the sum of its proper divisors (1).

404121539 is an equidigital number, since it uses as much as digits as its factorization.

404121539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 404121539 is about 20102.7744105136. The cubic root of 404121539 is about 739.3283039282.

The spelling of 404121539 in words is "four hundred four million, one hundred twenty-one thousand, five hundred thirty-nine".