449725709 has 4 divisors (see below), whose sum is σ = 449849916. Its totient is φ = 449601504.

The previous prime is 449725663. The next prime is 449725721. The reversal of 449725709 is 907527944.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 384277609 + 65448100 = 19603^2 + 8090^2 .

It is a cyclic number.

It is not a de Polignac number, because 449725709 - 2²⁴ = 432948493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449725729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56504 + ... + 63969.

It is an arithmetic number, because the mean of its divisors is an integer number (112462479).

Almost surely, 2^449725709 is an apocalyptic number.

It is an amenable number.

449725709 is a deficient number, since it is larger than the sum of its proper divisors (124207).

449725709 is a wasteful number, since it uses less digits than its factorization.

449725709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124206.

The product of its (nonzero) digits is 635040, while the sum is 47.

The square root of 449725709 is about 21206.7373492482. The cubic root of 449725709 is about 766.1537031332.

The spelling of 449725709 in words is "four hundred forty-nine million, seven hundred twenty-five thousand, seven hundred nine".