404274338509 has 2 divisors, whose sum is σ = 404274338510. Its totient is φ = 404274338508.

The previous prime is 404274338449. The next prime is 404274338521. The reversal of 404274338509 is 905833472404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365295733609 + 38978604900 = 604397^2 + 197430^2 .

It is a cyclic number.

It is not a de Polignac number, because 404274338509 - 2⁹ = 404274337997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404274338549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202137169254 + 202137169255.

It is an arithmetic number, because the mean of its divisors is an integer number (202137169255).

Almost surely, 2^404274338509 is an apocalyptic number.

It is an amenable number.

404274338509 is a deficient number, since it is larger than the sum of its proper divisors (1).

404274338509 is an equidigital number, since it uses as much as digits as its factorization.

404274338509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 404274338509 in words is "four hundred four billion, two hundred seventy-four million, three hundred thirty-eight thousand, five hundred nine".