1044240991 has 2 divisors, whose sum is σ = 1044240992. Its totient is φ = 1044240990.

The previous prime is 1044240979. The next prime is 1044241027. The reversal of 1044240991 is 1990424401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1044240991 - 2¹⁵ = 1044208223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1044240191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522120495 + 522120496.

It is an arithmetic number, because the mean of its divisors is an integer number (522120496).

Almost surely, 2^1044240991 is an apocalyptic number.

1044240991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1044240991 is an equidigital number, since it uses as much as digits as its factorization.

1044240991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1044240991 is about 32314.7178697262. The cubic root of 1044240991 is about 1014.5347155200.

The spelling of 1044240991 in words is "one billion, forty-four million, two hundred forty thousand, nine hundred ninety-one".