449756639 has 2 divisors, whose sum is σ = 449756640. Its totient is φ = 449756638.

The previous prime is 449756633. The next prime is 449756663. The reversal of 449756639 is 936657944.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 449756639 - 2⁸ = 449756383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449756633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224878319 + 224878320.

It is an arithmetic number, because the mean of its divisors is an integer number (224878320).

Almost surely, 2^449756639 is an apocalyptic number.

449756639 is a deficient number, since it is larger than the sum of its proper divisors (1).

449756639 is an equidigital number, since it uses as much as digits as its factorization.

449756639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 53.

The square root of 449756639 is about 21207.4665860871. The cubic root of 449756639 is about 766.1712668692.

The spelling of 449756639 in words is "four hundred forty-nine million, seven hundred fifty-six thousand, six hundred thirty-nine".