449891839 has 2 divisors, whose sum is σ = 449891840. Its totient is φ = 449891838.

The previous prime is 449891833. The next prime is 449891851. The reversal of 449891839 is 938198944.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 449891839 - 2²⁷ = 315674111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 449891839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449891833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224945919 + 224945920.

It is an arithmetic number, because the mean of its divisors is an integer number (224945920).

Almost surely, 2^449891839 is an apocalyptic number.

449891839 is a deficient number, since it is larger than the sum of its proper divisors (1).

449891839 is an equidigital number, since it uses as much as digits as its factorization.

449891839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 55.

The square root of 449891839 is about 21210.6539031686. The cubic root of 449891839 is about 766.2480313298.

The spelling of 449891839 in words is "four hundred forty-nine million, eight hundred ninety-one thousand, eight hundred thirty-nine".