404952309809 has 2 divisors, whose sum is σ = 404952309810. Its totient is φ = 404952309808.

The previous prime is 404952309793. The next prime is 404952309899. The reversal of 404952309809 is 908903259404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389341056784 + 15611253025 = 623972^2 + 124945^2 .

It is a cyclic number.

It is not a de Polignac number, because 404952309809 - 2⁴ = 404952309793 is a prime.

It is not a weakly prime, because it can be changed into another prime (404952309899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202476154904 + 202476154905.

It is an arithmetic number, because the mean of its divisors is an integer number (202476154905).

Almost surely, 2^404952309809 is an apocalyptic number.

It is an amenable number.

404952309809 is a deficient number, since it is larger than the sum of its proper divisors (1).

404952309809 is an equidigital number, since it uses as much as digits as its factorization.

404952309809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 404952309809 in words is "four hundred four billion, nine hundred fifty-two million, three hundred nine thousand, eight hundred nine".