447878213 has 2 divisors, whose sum is σ = 447878214. Its totient is φ = 447878212.

The previous prime is 447878201. The next prime is 447878261. The reversal of 447878213 is 312878744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328588129 + 119290084 = 18127^2 + 10922^2 .

It is a cyclic number.

It is not a de Polignac number, because 447878213 - 2¹² = 447874117 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 (447878513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223939106 + 223939107.

It is an arithmetic number, because the mean of its divisors is an integer number (223939107).

Almost surely, 2^447878213 is an apocalyptic number.

It is an amenable number.

447878213 is a deficient number, since it is larger than the sum of its proper divisors (1).

447878213 is an equidigital number, since it uses as much as digits as its factorization.

447878213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 44.

The square root of 447878213 is about 21163.1333455138. The cubic root of 447878213 is about 765.1031304709.

The spelling of 447878213 in words is "four hundred forty-seven million, eight hundred seventy-eight thousand, two hundred thirteen".