449432909 has 2 divisors, whose sum is σ = 449432910. Its totient is φ = 449432908.

The previous prime is 449432899. The next prime is 449432917. The reversal of 449432909 is 909234944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 447534025 + 1898884 = 21155^2 + 1378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-449432909 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 449432909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449432959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224716454 + 224716455.

It is an arithmetic number, because the mean of its divisors is an integer number (224716455).

Almost surely, 2^449432909 is an apocalyptic number.

It is an amenable number.

449432909 is a deficient number, since it is larger than the sum of its proper divisors (1).

449432909 is an equidigital number, since it uses as much as digits as its factorization.

449432909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 449432909 is about 21199.8327587743. The cubic root of 449432909 is about 765.9873954619.

The spelling of 449432909 in words is "four hundred forty-nine million, four hundred thirty-two thousand, nine hundred nine".