447999491 has 2 divisors, whose sum is σ = 447999492. Its totient is φ = 447999490.

The previous prime is 447999463. The next prime is 447999509. The reversal of 447999491 is 194999744.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447999491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (447999191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223999745 + 223999746.

It is an arithmetic number, because the mean of its divisors is an integer number (223999746).

Almost surely, 2^447999491 is an apocalyptic number.

447999491 is a deficient number, since it is larger than the sum of its proper divisors (1).

447999491 is an equidigital number, since it uses as much as digits as its factorization.

447999491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 56.

The square root of 447999491 is about 21165.9984645185. The cubic root of 447999491 is about 765.1721833225.

The spelling of 447999491 in words is "four hundred forty-seven million, nine hundred ninety-nine thousand, four hundred ninety-one".