626444449 has 4 divisors (see below), whose sum is σ = 627404436. Its totient is φ = 625484464.

The previous prime is 626444417. The next prime is 626444479. The reversal of 626444449 is 944444626.

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 43560000 + 582884449 = 6600^2 + 24143^2 .

It is a cyclic number.

It is not a de Polignac number, because 626444449 - 2⁵ = 626444417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (626444479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479014 + ... + 480319.

It is an arithmetic number, because the mean of its divisors is an integer number (156851109).

Almost surely, 2^626444449 is an apocalyptic number.

It is an amenable number.

626444449 is a deficient number, since it is larger than the sum of its proper divisors (959987).

626444449 is an equidigital number, since it uses as much as digits as its factorization.

626444449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959986.

The product of its digits is 663552, while the sum is 43.

The square root of 626444449 is about 25028.8723077968. The cubic root of 626444449 is about 855.6461260545.

The spelling of 626444449 in words is "six hundred twenty-six million, four hundred forty-four thousand, four hundred forty-nine".