1044397391 has 2 divisors, whose sum is σ = 1044397392. Its totient is φ = 1044397390.

The previous prime is 1044397379. The next prime is 1044397411. The reversal of 1044397391 is 1937934401.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1044397391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1044397591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522198695 + 522198696.

It is an arithmetic number, because the mean of its divisors is an integer number (522198696).

Almost surely, 2^1044397391 is an apocalyptic number.

1044397391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1044397391 is an equidigital number, since it uses as much as digits as its factorization.

1044397391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 1044397391 is about 32317.1377290750. The cubic root of 1044397391 is about 1014.5853632504.

The spelling of 1044397391 in words is "one billion, forty-four million, three hundred ninety-seven thousand, three hundred ninety-one".