1044890993 has 4 divisors (see below), whose sum is σ = 1047885300. Its totient is φ = 1041896688.

The previous prime is 1044890963. The next prime is 1044891007. The reversal of 1044890993 is 3990984401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3990984401 = 137 ⋅29131273.

It can be written as a sum of positive squares in 2 ways, for example, as 856323169 + 188567824 = 29263^2 + 13732^2 .

It is a cyclic number.

It is not a de Polignac number, because 1044890993 - 2¹⁰ = 1044889969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1044890963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1496630 + ... + 1497327.

It is an arithmetic number, because the mean of its divisors is an integer number (261971325).

Almost surely, 2^1044890993 is an apocalyptic number.

It is an amenable number.

1044890993 is a deficient number, since it is larger than the sum of its proper divisors (2994307).

1044890993 is an equidigital number, since it uses as much as digits as its factorization.

1044890993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994306.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 1044890993 is about 32324.7736728349. The cubic root of 1044890993 is about 1014.7451754998.

The spelling of 1044890993 in words is "one billion, forty-four million, eight hundred ninety thousand, nine hundred ninety-three".