449865491 has 2 divisors, whose sum is σ = 449865492. Its totient is φ = 449865490.

The previous prime is 449865473. The next prime is 449865517. The reversal of 449865491 is 194568944.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-449865491 is a prime.

It is not a weakly prime, because it can be changed into another prime (449865401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224932745 + 224932746.

It is an arithmetic number, because the mean of its divisors is an integer number (224932746).

Almost surely, 2^449865491 is an apocalyptic number.

449865491 is a deficient number, since it is larger than the sum of its proper divisors (1).

449865491 is an equidigital number, since it uses as much as digits as its factorization.

449865491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 50.

The square root of 449865491 is about 21210.0327911109. The cubic root of 449865491 is about 766.2330725512.

The spelling of 449865491 in words is "four hundred forty-nine million, eight hundred sixty-five thousand, four hundred ninety-one".