1313113444 has 12 divisors (see below), whose sum is σ = 2321639404. Its totient is φ = 649787904.

The previous prime is 1313113441. The next prime is 1313113453. The reversal of 1313113444 is 4443113131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 908299044 + 404814400 = 30138^2 + 20120^2 .

It is a super-2 number, since 2×1313113444² = 3448533833627082272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1313113441) 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, 1691769 + ... + 1692544.

Almost surely, 2^1313113444 is an apocalyptic number.

It is an amenable number.

1313113444 is a deficient number, since it is larger than the sum of its proper divisors (1008525960).

1313113444 is a wasteful number, since it uses less digits than its factorization.

1313113444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384414 (or 3384412 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 1313113444 is about 36236.9072079834. The cubic root of 1313113444 is about 1095.0503355301.

Adding to 1313113444 its reverse (4443113131), we get a palindrome (5756226575).

The spelling of 1313113444 in words is "one billion, three hundred thirteen million, one hundred thirteen thousand, four hundred forty-four".