1044538809 has 4 divisors (see below), whose sum is σ = 1392718416. Its totient is φ = 696359204.

The previous prime is 1044538793. The next prime is 1044538853. The reversal of 1044538809 is 9088354401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1044538809 - 2⁴ = 1044538793 is a prime.

It is a super-2 number, since 2×1044538809² = 2182122647014276962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1044538109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174089799 + ... + 174089804.

It is an arithmetic number, because the mean of its divisors is an integer number (348179604).

Almost surely, 2^1044538809 is an apocalyptic number.

It is an amenable number.

1044538809 is a deficient number, since it is larger than the sum of its proper divisors (348179607).

1044538809 is an equidigital number, since it uses as much as digits as its factorization.

1044538809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348179606.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 1044538809 is about 32319.3256272466. The cubic root of 1044538809 is about 1014.6311549380.

The spelling of 1044538809 in words is "one billion, forty-four million, five hundred thirty-eight thousand, eight hundred nine".