404355109 has 2 divisors, whose sum is σ = 404355110. Its totient is φ = 404355108.

The previous prime is 404355071. The next prime is 404355113. The reversal of 404355109 is 901553404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345142084 + 59213025 = 18578^2 + 7695^2 .

It is a cyclic number.

It is not a de Polignac number, because 404355109 - 2⁹ = 404354597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404355139) 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, 202177554 + 202177555.

It is an arithmetic number, because the mean of its divisors is an integer number (202177555).

Almost surely, 2^404355109 is an apocalyptic number.

It is an amenable number.

404355109 is a deficient number, since it is larger than the sum of its proper divisors (1).

404355109 is an equidigital number, since it uses as much as digits as its factorization.

404355109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 404355109 is about 20108.5829684739. The cubic root of 404355109 is about 739.4707129455.

The spelling of 404355109 in words is "four hundred four million, three hundred fifty-five thousand, one hundred nine".