1044402013 has 4 divisors (see below), whose sum is σ = 1099370560. Its totient is φ = 989433468.

The previous prime is 1044401971. The next prime is 1044402043. The reversal of 1044402013 is 3102044401.

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 a de Polignac number, because none of the positive numbers 2^k-1044402013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 54968527 = 1044402013 / (1 + 0 + 4 + 4 + 4 + 0 + 2 + 0 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1044402043) 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, 27484245 + ... + 27484282.

It is an arithmetic number, because the mean of its divisors is an integer number (274842640).

Almost surely, 2^1044402013 is an apocalyptic number.

It is an amenable number.

1044402013 is a deficient number, since it is larger than the sum of its proper divisors (54968547).

1044402013 is an equidigital number, since it uses as much as digits as its factorization.

1044402013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54968546.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1044402013 is about 32317.2092390417. The cubic root of 1044402013 is about 1014.5868599369.

Adding to 1044402013 its reverse (3102044401), we get a palindrome (4146446414).

The spelling of 1044402013 in words is "one billion, forty-four million, four hundred two thousand, thirteen".