404313421 has 2 divisors, whose sum is σ = 404313422. Its totient is φ = 404313420.

The previous prime is 404313401. The next prime is 404313433. The reversal of 404313421 is 124313404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302586025 + 101727396 = 17395^2 + 10086^2 .

It is a cyclic number.

It is not a de Polignac number, because 404313421 - 2¹⁷ = 404182349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 404313392 and 404313401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404313401) 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, 202156710 + 202156711.

It is an arithmetic number, because the mean of its divisors is an integer number (202156711).

Almost surely, 2^404313421 is an apocalyptic number.

It is an amenable number.

404313421 is a deficient number, since it is larger than the sum of its proper divisors (1).

404313421 is an equidigital number, since it uses as much as digits as its factorization.

404313421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 404313421 is about 20107.5463694604. The cubic root of 404313421 is about 739.4452995454.

Adding to 404313421 its reverse (124313404), we get a palindrome (528626825).

The spelling of 404313421 in words is "four hundred four million, three hundred thirteen thousand, four hundred twenty-one".