1204044013 has 4 divisors (see below), whose sum is σ = 1204116700. Its totient is φ = 1203971328.

The previous prime is 1204043987. The next prime is 1204044059. The reversal of 1204044013 is 3104404021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 509088969 + 694955044 = 22563^2 + 26362^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204044013 - 2²⁵ = 1170489581 is a prime.

It is a super-2 number, since 2×1204044013² = 2899443970482288338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204044613) 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, 1963 + ... + 49111.

It is an arithmetic number, because the mean of its divisors is an integer number (301029175).

Almost surely, 2^1204044013 is an apocalyptic number.

It is an amenable number.

1204044013 is a deficient number, since it is larger than the sum of its proper divisors (72687).

1204044013 is an equidigital number, since it uses as much as digits as its factorization.

1204044013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72686.

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

The square root of 1204044013 is about 34699.3373567854. The cubic root of 1204044013 is about 1063.8509543638.

Adding to 1204044013 its reverse (3104404021), we get a palindrome (4308448034).

The spelling of 1204044013 in words is "one billion, two hundred four million, forty-four thousand, thirteen".