404749879 has 2 divisors, whose sum is σ = 404749880. Its totient is φ = 404749878.

The previous prime is 404749861. The next prime is 404749979. The reversal of 404749879 is 978947404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404749879 - 2¹⁷ = 404618807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404749859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202374939 + 202374940.

It is an arithmetic number, because the mean of its divisors is an integer number (202374940).

Almost surely, 2^404749879 is an apocalyptic number.

404749879 is a deficient number, since it is larger than the sum of its proper divisors (1).

404749879 is an equidigital number, since it uses as much as digits as its factorization.

404749879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The square root of 404749879 is about 20118.3965315330. The cubic root of 404749879 is about 739.7112819388.

The spelling of 404749879 in words is "four hundred four million, seven hundred forty-nine thousand, eight hundred seventy-nine".