1303111013 has 4 divisors (see below), whose sum is σ = 1379764620. Its totient is φ = 1226457408.

The previous prime is 1303111003. The next prime is 1303111021. The reversal of 1303111013 is 3101113031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 503239489 + 799871524 = 22433^2 + 28282^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303111013 - 2¹⁰ = 1303109989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303111003) 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, 38326778 + ... + 38326811.

It is an arithmetic number, because the mean of its divisors is an integer number (344941155).

Almost surely, 2^1303111013 is an apocalyptic number.

It is an amenable number.

1303111013 is a deficient number, since it is larger than the sum of its proper divisors (76653607).

1303111013 is an equidigital number, since it uses as much as digits as its factorization.

1303111013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76653606.

The product of its (nonzero) digits is 27, while the sum is 14.

The square root of 1303111013 is about 36098.6289628844. The cubic root of 1303111013 is about 1092.2627888551.

Adding to 1303111013 its reverse (3101113031), we get a palindrome (4404224044).

The spelling of 1303111013 in words is "one billion, three hundred three million, one hundred eleven thousand, thirteen".