447316381 has 2 divisors, whose sum is σ = 447316382. Its totient is φ = 447316380.

The previous prime is 447316349. The next prime is 447316423. The reversal of 447316381 is 183613744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258116356 + 189200025 = 16066^2 + 13755^2 .

It is a cyclic number.

It is not a de Polignac number, because 447316381 - 2⁵ = 447316349 is a prime.

It is a super-2 number, since 2×447316381² = 400183889421874322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 447316381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447316301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223658190 + 223658191.

It is an arithmetic number, because the mean of its divisors is an integer number (223658191).

Almost surely, 2^447316381 is an apocalyptic number.

It is an amenable number.

447316381 is a deficient number, since it is larger than the sum of its proper divisors (1).

447316381 is an equidigital number, since it uses as much as digits as its factorization.

447316381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 447316381 is about 21149.8553422949. The cubic root of 447316381 is about 764.7830737548.

The spelling of 447316381 in words is "four hundred forty-seven million, three hundred sixteen thousand, three hundred eighty-one".