404447213 has 2 divisors, whose sum is σ = 404447214. Its totient is φ = 404447212.

The previous prime is 404447209. The next prime is 404447237. The reversal of 404447213 is 312744404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263835049 + 140612164 = 16243^2 + 11858^2 .

It is a cyclic number.

It is not a de Polignac number, because 404447213 - 2² = 404447209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404447413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202223606 + 202223607.

It is an arithmetic number, because the mean of its divisors is an integer number (202223607).

Almost surely, 2^404447213 is an apocalyptic number.

It is an amenable number.

404447213 is a deficient number, since it is larger than the sum of its proper divisors (1).

404447213 is an equidigital number, since it uses as much as digits as its factorization.

404447213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 404447213 is about 20110.8730044223. The cubic root of 404447213 is about 739.5268542253.

The spelling of 404447213 in words is "four hundred four million, four hundred forty-seven thousand, two hundred thirteen".