1313123133 has 8 divisors (see below), whose sum is σ = 2000949568. Its totient is φ = 750356064.

The previous prime is 1313123087. The next prime is 1313123159. The reversal of 1313123133 is 3313213131.

1313123133 is nontrivially palindromic in base 6.

1313123133 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1313123133 - 2²⁰ = 1312074557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 62529673 = 1313123133 / (1 + 3 + 1 + 3 + 1 + 2 + 3 + 1 + 3 + 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 (1313123173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31264816 + ... + 31264857.

It is an arithmetic number, because the mean of its divisors is an integer number (250118696).

Almost surely, 2^1313123133 is an apocalyptic number.

It is an amenable number.

1313123133 is a deficient number, since it is larger than the sum of its proper divisors (687826435).

1313123133 is an equidigital number, since it uses as much as digits as its factorization.

1313123133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62529683.

The product of its digits is 486, while the sum is 21.

The square root of 1313123133 is about 36237.0408974022. The cubic root of 1313123133 is about 1095.0530288532.

Adding to 1313123133 its reverse (3313213131), we get a palindrome (4626336264).

The spelling of 1313123133 in words is "one billion, three hundred thirteen million, one hundred twenty-three thousand, one hundred thirty-three".