1444977769 has 4 divisors (see below), whose sum is σ = 1445066820. Its totient is φ = 1444888720.

The previous prime is 1444977763. The next prime is 1444977799. The reversal of 1444977769 is 9677794441.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 779079744 + 665898025 = 27912^2 + 25805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444977769 - 2⁷ = 1444977641 is a prime.

It is a super-2 number, since 2×1444977769² = 4175921505808434722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1444977763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12514 + ... + 55195.

It is an arithmetic number, because the mean of its divisors is an integer number (361266705).

Almost surely, 2^1444977769 is an apocalyptic number.

It is an amenable number.

1444977769 is a deficient number, since it is larger than the sum of its proper divisors (89051).

1444977769 is an equidigital number, since it uses as much as digits as its factorization.

1444977769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89050.

The product of its digits is 10668672, while the sum is 58.

The square root of 1444977769 is about 38012.8632044470. The cubic root of 1444977769 is about 1130.5429215524.

The spelling of 1444977769 in words is "one billion, four hundred forty-four million, nine hundred seventy-seven thousand, seven hundred sixty-nine".