447081997 has 8 divisors (see below), whose sum is σ = 476120376. Its totient is φ = 418348032.

The previous prime is 447081937. The next prime is 447082007. The reversal of 447081997 is 799180744.

It can be written as a sum of positive squares in 4 ways, for example, as 209120521 + 237961476 = 14461^2 + 15426^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447081997 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 447081997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447081937) 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, 73068 + ... + 78949.

It is an arithmetic number, because the mean of its divisors is an integer number (59515047).

Almost surely, 2^447081997 is an apocalyptic number.

It is an amenable number.

447081997 is a deficient number, since it is larger than the sum of its proper divisors (29038379).

447081997 is a wasteful number, since it uses less digits than its factorization.

447081997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152207.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 447081997 is about 21144.3135854537. The cubic root of 447081997 is about 764.6494738831.

The spelling of 447081997 in words is "four hundred forty-seven million, eighty-one thousand, nine hundred ninety-seven".