444456137 has 2 divisors, whose sum is σ = 444456138. Its totient is φ = 444456136.

The previous prime is 444456107. The next prime is 444456139. The reversal of 444456137 is 731654444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 358875136 + 85581001 = 18944^2 + 9251^2 .

It is a cyclic number.

It is not a de Polignac number, because 444456137 - 2¹⁰ = 444455113 is a prime.

Together with 444456139, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 444456137.

It is not a weakly prime, because it can be changed into another prime (444456139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222228068 + 222228069.

It is an arithmetic number, because the mean of its divisors is an integer number (222228069).

Almost surely, 2^444456137 is an apocalyptic number.

It is an amenable number.

444456137 is a deficient number, since it is larger than the sum of its proper divisors (1).

444456137 is an equidigital number, since it uses as much as digits as its factorization.

444456137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 38.

The square root of 444456137 is about 21082.1283792695. The cubic root of 444456137 is about 763.1495206276.

The spelling of 444456137 in words is "four hundred forty-four million, four hundred fifty-six thousand, one hundred thirty-seven".