449919689 has 2 divisors, whose sum is σ = 449919690. Its totient is φ = 449919688.

The previous prime is 449919683. The next prime is 449919733. The reversal of 449919689 is 986919944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389391289 + 60528400 = 19733^2 + 7780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-449919689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (449919683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224959844 + 224959845.

It is an arithmetic number, because the mean of its divisors is an integer number (224959845).

Almost surely, 2^449919689 is an apocalyptic number.

It is an amenable number.

449919689 is a deficient number, since it is larger than the sum of its proper divisors (1).

449919689 is an equidigital number, since it uses as much as digits as its factorization.

449919689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 59.

The square root of 449919689 is about 21211.3104027073. The cubic root of 449919689 is about 766.2638422170.

The spelling of 449919689 in words is "four hundred forty-nine million, nine hundred nineteen thousand, six hundred eighty-nine".