404749979 has 2 divisors, whose sum is σ = 404749980. Its totient is φ = 404749978.

The previous prime is 404749879. The next prime is 404750009. The reversal of 404749979 is 979947404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404749979 - 2¹² = 404745883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404749979.

It is not a weakly prime, because it can be changed into another prime (404749679) 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, 202374989 + 202374990.

It is an arithmetic number, because the mean of its divisors is an integer number (202374990).

Almost surely, 2^404749979 is an apocalyptic number.

404749979 is a deficient number, since it is larger than the sum of its proper divisors (1).

404749979 is an equidigital number, since it uses as much as digits as its factorization.

404749979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 404749979 is about 20118.3990168204. The cubic root of 404749979 is about 739.7113428580.

The spelling of 404749979 in words is "four hundred four million, seven hundred forty-nine thousand, nine hundred seventy-nine".