1313111023 has 4 divisors (see below), whose sum is σ = 1500698320. Its totient is φ = 1125523728.

The previous prime is 1313111011. The next prime is 1313111029. The reversal of 1313111023 is 3201113131.

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

It is not a de Polignac number, because 1313111023 - 2¹⁷ = 1312979951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313110988 and 1313111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313111029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93793638 + ... + 93793651.

It is an arithmetic number, because the mean of its divisors is an integer number (375174580).

Almost surely, 2^1313111023 is an apocalyptic number.

1313111023 is a deficient number, since it is larger than the sum of its proper divisors (187587297).

1313111023 is an equidigital number, since it uses as much as digits as its factorization.

1313111023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187587296.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1313111023 is about 36236.8738027993. The cubic root of 1313111023 is about 1095.0496625447.

Adding to 1313111023 its reverse (3201113131), we get a palindrome (4514224154).

The spelling of 1313111023 in words is "one billion, three hundred thirteen million, one hundred eleven thousand, twenty-three".