204404279 has 2 divisors, whose sum is σ = 204404280. Its totient is φ = 204404278.

The previous prime is 204404257. The next prime is 204404281. The reversal of 204404279 is 972404402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204404279 is a prime.

It is a super-2 number, since 2×204404279² = 83562218547019682, which contains 22 as substring.

Together with 204404281, 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 (204404219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102202139 + 102202140.

It is an arithmetic number, because the mean of its divisors is an integer number (102202140).

Almost surely, 2^204404279 is an apocalyptic number.

204404279 is a deficient number, since it is larger than the sum of its proper divisors (1).

204404279 is an equidigital number, since it uses as much as digits as its factorization.

204404279 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 204404279 is about 14297.0024480658. The cubic root of 204404279 is about 589.0651469166.

The spelling of 204404279 in words is "two hundred four million, four hundred four thousand, two hundred seventy-nine".