404250409 has 2 divisors, whose sum is σ = 404250410. Its totient is φ = 404250408.

The previous prime is 404250397. The next prime is 404250433. The reversal of 404250409 is 904052404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222755625 + 181494784 = 14925^2 + 13472^2 .

It is a cyclic number.

It is not a de Polignac number, because 404250409 - 2⁵ = 404250377 is a prime.

It is not a weakly prime, because it can be changed into another prime (404250449) 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, 202125204 + 202125205.

It is an arithmetic number, because the mean of its divisors is an integer number (202125205).

Almost surely, 2^404250409 is an apocalyptic number.

It is an amenable number.

404250409 is a deficient number, since it is larger than the sum of its proper divisors (1).

404250409 is an equidigital number, since it uses as much as digits as its factorization.

404250409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 404250409 is about 20105.9794339893. The cubic root of 404250409 is about 739.4068835166.

The spelling of 404250409 in words is "four hundred four million, two hundred fifty thousand, four hundred nine".