404224439 has 2 divisors, whose sum is σ = 404224440. Its totient is φ = 404224438.

The previous prime is 404224397. The next prime is 404224451. The reversal of 404224439 is 934422404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404224439 - 2¹⁶ = 404158903 is a prime.

It is a Chen prime.

It is equal to p_21549506 and since 404224439 and 21549506 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404224489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202112219 + 202112220.

It is an arithmetic number, because the mean of its divisors is an integer number (202112220).

Almost surely, 2^404224439 is an apocalyptic number.

404224439 is a deficient number, since it is larger than the sum of its proper divisors (1).

404224439 is an equidigital number, since it uses as much as digits as its factorization.

404224439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 404224439 is about 20105.3335958397. Note that the first 3 decimals coincide. The cubic root of 404224439 is about 739.3910494300.

The spelling of 404224439 in words is "four hundred four million, two hundred twenty-four thousand, four hundred thirty-nine".