449647789 has 2 divisors, whose sum is σ = 449647790. Its totient is φ = 449647788.

The previous prime is 449647771. The next prime is 449647799. The reversal of 449647789 is 987746944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 306845289 + 142802500 = 17517^2 + 11950^2 .

It is a cyclic number.

It is not a de Polignac number, because 449647789 - 2¹⁵ = 449615021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449647799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224823894 + 224823895.

It is an arithmetic number, because the mean of its divisors is an integer number (224823895).

Almost surely, 2^449647789 is an apocalyptic number.

It is an amenable number.

449647789 is a deficient number, since it is larger than the sum of its proper divisors (1).

449647789 is an equidigital number, since it uses as much as digits as its factorization.

449647789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 58.

The square root of 449647789 is about 21204.9001176615. The cubic root of 449647789 is about 766.1094523499.

The spelling of 449647789 in words is "four hundred forty-nine million, six hundred forty-seven thousand, seven hundred eighty-nine".