404572397 has 2 divisors, whose sum is σ = 404572398. Its totient is φ = 404572396.

The previous prime is 404572391. The next prime is 404572411. The reversal of 404572397 is 793275404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306285001 + 98287396 = 17501^2 + 9914^2 .

It is a cyclic number.

It is not a de Polignac number, because 404572397 - 2⁸ = 404572141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404572391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202286198 + 202286199.

It is an arithmetic number, because the mean of its divisors is an integer number (202286199).

Almost surely, 2^404572397 is an apocalyptic number.

It is an amenable number.

404572397 is a deficient number, since it is larger than the sum of its proper divisors (1).

404572397 is an equidigital number, since it uses as much as digits as its factorization.

404572397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 404572397 is about 20113.9851098682. The cubic root of 404572397 is about 739.6031454997.

The spelling of 404572397 in words is "four hundred four million, five hundred seventy-two thousand, three hundred ninety-seven".