447097993 has 4 divisors (see below), whose sum is σ = 450361620. Its totient is φ = 443834368.

The previous prime is 447097979. The next prime is 447098023. The reversal of 447097993 is 399790744.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129117769 + 317980224 = 11363^2 + 17832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447097993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 447097993.

It is not an unprimeable number, because it can be changed into a prime (447094993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1631608 + ... + 1631881.

It is an arithmetic number, because the mean of its divisors is an integer number (112590405).

Almost surely, 2^447097993 is an apocalyptic number.

It is an amenable number.

447097993 is a deficient number, since it is larger than the sum of its proper divisors (3263627).

447097993 is a wasteful number, since it uses less digits than its factorization.

447097993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263626.

The product of its (nonzero) digits is 1714608, while the sum is 52.

The square root of 447097993 is about 21144.6918397975. The cubic root of 447097993 is about 764.6585931552.

The spelling of 447097993 in words is "four hundred forty-seven million, ninety-seven thousand, nine hundred ninety-three".