1444865749 has 2 divisors, whose sum is σ = 1444865750. Its totient is φ = 1444865748.

The previous prime is 1444865689. The next prime is 1444865761. The reversal of 1444865749 is 9475684441.

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., 1316383524 + 128482225 = 36282^2 + 11335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444865749 - 2²⁷ = 1310648021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1444865696 and 1444865705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1444805749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722432874 + 722432875.

It is an arithmetic number, because the mean of its divisors is an integer number (722432875).

Almost surely, 2^1444865749 is an apocalyptic number.

It is an amenable number.

1444865749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444865749 is an equidigital number, since it uses as much as digits as its factorization.

1444865749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 52.

The square root of 1444865749 is about 38011.3897272910. The cubic root of 1444865749 is about 1130.5137061800.

The spelling of 1444865749 in words is "one billion, four hundred forty-four million, eight hundred sixty-five thousand, seven hundred forty-nine".