1044142991 has 2 divisors, whose sum is σ = 1044142992. Its totient is φ = 1044142990.

The previous prime is 1044142973. The next prime is 1044143027. The reversal of 1044142991 is 1992414401.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1044142991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1044142291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522071495 + 522071496.

It is an arithmetic number, because the mean of its divisors is an integer number (522071496).

Almost surely, 2^1044142991 is an apocalyptic number.

1044142991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1044142991 is an equidigital number, since it uses as much as digits as its factorization.

1044142991 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 35.

The square root of 1044142991 is about 32313.2014972209. The cubic root of 1044142991 is about 1014.5029771526.

The spelling of 1044142991 in words is "one billion, forty-four million, one hundred forty-two thousand, nine hundred ninety-one".