404224397 has 2 divisors, whose sum is σ = 404224398. Its totient is φ = 404224396.

The previous prime is 404224357. The next prime is 404224439. The reversal of 404224397 is 793422404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343212676 + 61011721 = 18526^2 + 7811^2 .

It is a cyclic number.

It is not a de Polignac number, because 404224397 - 2²⁰ = 403175821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404224357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202112198 + 202112199.

It is an arithmetic number, because the mean of its divisors is an integer number (202112199).

Almost surely, 2^404224397 is an apocalyptic number.

It is an amenable number.

404224397 is a deficient number, since it is larger than the sum of its proper divisors (1).

404224397 is an equidigital number, since it uses as much as digits as its factorization.

404224397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 404224397 is about 20105.3325513407. The cubic root of 404224397 is about 739.3910238218.

The spelling of 404224397 in words is "four hundred four million, two hundred twenty-four thousand, three hundred ninety-seven".