447346721 has 8 divisors (see below), whose sum is σ = 489994920. Its totient is φ = 406513408.

The previous prime is 447346717. The next prime is 447346769. The reversal of 447346721 is 127643744.

It can be written as a sum of positive squares in 4 ways, for example, as 34810000 + 412536721 = 5900^2 + 20311^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 447346721 - 2² = 447346717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (447340721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453206 + ... + 454191.

It is an arithmetic number, because the mean of its divisors is an integer number (61249365).

Almost surely, 2^447346721 is an apocalyptic number.

It is an amenable number.

447346721 is a deficient number, since it is larger than the sum of its proper divisors (42648199).

447346721 is a wasteful number, since it uses less digits than its factorization.

447346721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907443.

The product of its digits is 112896, while the sum is 38.

The square root of 447346721 is about 21150.5725927219. The cubic root of 447346721 is about 764.8003642713.

The spelling of 447346721 in words is "four hundred forty-seven million, three hundred forty-six thousand, seven hundred twenty-one".