444667649 has 2 divisors, whose sum is σ = 444667650. Its totient is φ = 444667648.

The previous prime is 444667637. The next prime is 444667651. The reversal of 444667649 is 946766444.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409050625 + 35617024 = 20225^2 + 5968^2 .

It is a cyclic number.

It is not a de Polignac number, because 444667649 - 2⁴ = 444667633 is a prime.

Together with 444667651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 444667597 and 444667606.

It is not a weakly prime, because it can be changed into another prime (444667049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222333824 + 222333825.

It is an arithmetic number, because the mean of its divisors is an integer number (222333825).

Almost surely, 2^444667649 is an apocalyptic number.

It is an amenable number.

444667649 is a deficient number, since it is larger than the sum of its proper divisors (1).

444667649 is an equidigital number, since it uses as much as digits as its factorization.

444667649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 50.

The square root of 444667649 is about 21087.1441641584. The cubic root of 444667649 is about 763.2705597055.

The spelling of 444667649 in words is "four hundred forty-four million, six hundred sixty-seven thousand, six hundred forty-nine".