447226649 has 2 divisors, whose sum is σ = 447226650. Its totient is φ = 447226648.

The previous prime is 447226631. The next prime is 447226679. The reversal of 447226649 is 946622744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225961024 + 221265625 = 15032^2 + 14875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447226649 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (447226609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223613324 + 223613325.

It is an arithmetic number, because the mean of its divisors is an integer number (223613325).

Almost surely, 2^447226649 is an apocalyptic number.

It is an amenable number.

447226649 is a deficient number, since it is larger than the sum of its proper divisors (1).

447226649 is an equidigital number, since it uses as much as digits as its factorization.

447226649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 44.

The square root of 447226649 is about 21147.7338975125. The cubic root of 447226649 is about 764.7319316497.

The spelling of 447226649 in words is "four hundred forty-seven million, two hundred twenty-six thousand, six hundred forty-nine".