441868649 has 2 divisors, whose sum is σ = 441868650. Its totient is φ = 441868648.

The previous prime is 441868639. The next prime is 441868711. The reversal of 441868649 is 946868144.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440160400 + 1708249 = 20980^2 + 1307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-441868649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 441868597 and 441868606.

It is not a weakly prime, because it can be changed into another prime (441868619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220934324 + 220934325.

It is an arithmetic number, because the mean of its divisors is an integer number (220934325).

Almost surely, 2^441868649 is an apocalyptic number.

It is an amenable number.

441868649 is a deficient number, since it is larger than the sum of its proper divisors (1).

441868649 is an equidigital number, since it uses as much as digits as its factorization.

441868649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104, while the sum is 50.

The square root of 441868649 is about 21020.6719445407. The cubic root of 441868649 is about 761.6656962248.

The spelling of 441868649 in words is "four hundred forty-one million, eight hundred sixty-eight thousand, six hundred forty-nine".