1044391769 has 2 divisors, whose sum is σ = 1044391770. Its totient is φ = 1044391768.

The previous prime is 1044391763. The next prime is 1044391807. The reversal of 1044391769 is 9671934401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 853399369 + 190992400 = 29213^2 + 13820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1044391769 is a prime.

It is a super-2 number, since 2×1044391769² = 2181508334309898722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1044391763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522195884 + 522195885.

It is an arithmetic number, because the mean of its divisors is an integer number (522195885).

Almost surely, 2^1044391769 is an apocalyptic number.

It is an amenable number.

1044391769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1044391769 is an equidigital number, since it uses as much as digits as its factorization.

1044391769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 1044391769 is about 32317.0507472449. The cubic root of 1044391769 is about 1014.5835427399.

The spelling of 1044391769 in words is "one billion, forty-four million, three hundred ninety-one thousand, seven hundred sixty-nine".