1044400013 has 4 divisors (see below), whose sum is σ = 1078090368. Its totient is φ = 1010709660.

The previous prime is 1044400009. The next prime is 1044400043. The reversal of 1044400013 is 3100044401.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3100044401 = 17 ⋅182355553.

It is a cyclic number.

It is not a de Polignac number, because 1044400013 - 2² = 1044400009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1044399964 and 1044400000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1044400043) 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, 16845131 + ... + 16845192.

It is an arithmetic number, because the mean of its divisors is an integer number (269522592).

Almost surely, 2^1044400013 is an apocalyptic number.

It is an amenable number.

1044400013 is a deficient number, since it is larger than the sum of its proper divisors (33690355).

1044400013 is an equidigital number, since it uses as much as digits as its factorization.

1044400013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33690354.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1044400013 is about 32317.1782957609. The cubic root of 1044400013 is about 1014.5862123016.

Adding to 1044400013 its reverse (3100044401), we get a palindrome (4144444414).

The spelling of 1044400013 in words is "one billion, forty-four million, four hundred thousand, thirteen".