1044991357 has 2 divisors, whose sum is σ = 1044991358. Its totient is φ = 1044991356.

The previous prime is 1044991351. The next prime is 1044991391. The reversal of 1044991357 is 7531994401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 738426276 + 306565081 = 27174^2 + 17509^2 .

It is a cyclic number.

It is not a de Polignac number, because 1044991357 - 2²⁷ = 910773629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1044991351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522495678 + 522495679.

It is an arithmetic number, because the mean of its divisors is an integer number (522495679).

Almost surely, 2^1044991357 is an apocalyptic number.

It is an amenable number.

1044991357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1044991357 is an equidigital number, since it uses as much as digits as its factorization.

1044991357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1044991357 is about 32326.3260671546. The cubic root of 1044991357 is about 1014.7776639364. Note that the first 3 decimals are identical.

The spelling of 1044991357 in words is "one billion, forty-four million, nine hundred ninety-one thousand, three hundred fifty-seven".