404402279 has 2 divisors, whose sum is σ = 404402280. Its totient is φ = 404402278.

The previous prime is 404402263. The next prime is 404402281. The reversal of 404402279 is 972204404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404402279 - 2⁴ = 404402263 is a prime.

Together with 404402281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404422279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202201139 + 202201140.

It is an arithmetic number, because the mean of its divisors is an integer number (202201140).

Almost surely, 2^404402279 is an apocalyptic number.

404402279 is a deficient number, since it is larger than the sum of its proper divisors (1).

404402279 is an equidigital number, since it uses as much as digits as its factorization.

404402279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 404402279 is about 20109.7558165185. The cubic root of 404402279 is about 739.4994661185.

The spelling of 404402279 in words is "four hundred four million, four hundred two thousand, two hundred seventy-nine".