444420637 has 2 divisors, whose sum is σ = 444420638. Its totient is φ = 444420636.

The previous prime is 444420631. The next prime is 444420643. The reversal of 444420637 is 736024444.

It is a balanced prime because it is at equal distance from previous prime (444420631) and next prime (444420643).

It can be written as a sum of positive squares in only one way, i.e., 270470916 + 173949721 = 16446^2 + 13189^2 .

It is a cyclic number.

It is not a de Polignac number, because 444420637 - 2¹⁵ = 444387869 is a prime.

It is a super-3 number, since 3×444420637³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444420631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222210318 + 222210319.

It is an arithmetic number, because the mean of its divisors is an integer number (222210319).

Almost surely, 2^444420637 is an apocalyptic number.

It is an amenable number.

444420637 is a deficient number, since it is larger than the sum of its proper divisors (1).

444420637 is an equidigital number, since it uses as much as digits as its factorization.

444420637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 34.

The square root of 444420637 is about 21081.2864171046. The cubic root of 444420637 is about 763.1292017652.

The spelling of 444420637 in words is "four hundred forty-four million, four hundred twenty thousand, six hundred thirty-seven".