444664057 has 2 divisors, whose sum is σ = 444664058. Its totient is φ = 444664056.

The previous prime is 444664043. The next prime is 444664063. The reversal of 444664057 is 750466444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 423906921 + 20757136 = 20589^2 + 4556^2 .

It is a cyclic number.

It is not a de Polignac number, because 444664057 - 2⁷ = 444663929 is a prime.

It is a super-2 number, since 2×444664057² = 395452247175398498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (444664457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222332028 + 222332029.

It is an arithmetic number, because the mean of its divisors is an integer number (222332029).

Almost surely, 2^444664057 is an apocalyptic number.

It is an amenable number.

444664057 is a deficient number, since it is larger than the sum of its proper divisors (1).

444664057 is an equidigital number, since it uses as much as digits as its factorization.

444664057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 40.

The square root of 444664057 is about 21087.0589936103. The cubic root of 444664057 is about 763.2685044812.

The spelling of 444664057 in words is "four hundred forty-four million, six hundred sixty-four thousand, fifty-seven".