1444220137 has 2 divisors, whose sum is σ = 1444220138. Its totient is φ = 1444220136.

The previous prime is 1444220131. The next prime is 1444220171. The reversal of 1444220137 is 7310224441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1409927401 + 34292736 = 37549^2 + 5856^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444220137 - 2⁷ = 1444220009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1444220131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722110068 + 722110069.

It is an arithmetic number, because the mean of its divisors is an integer number (722110069).

Almost surely, 2^1444220137 is an apocalyptic number.

It is an amenable number.

1444220137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444220137 is an equidigital number, since it uses as much as digits as its factorization.

1444220137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 1444220137 is about 38002.8964290881. The cubic root of 1444220137 is about 1130.3452979265.

Adding to 1444220137 its reverse (7310224441), we get a palindrome (8754444578).

The spelling of 1444220137 in words is "one billion, four hundred forty-four million, two hundred twenty thousand, one hundred thirty-seven".