1313013123 has 6 divisors (see below), whose sum is σ = 1896574524. Its totient is φ = 875342076.

The previous prime is 1313013047. The next prime is 1313013209. The reversal of 1313013123 is 3213103131.

It is a happy number.

It is not a de Polignac number, because 1313013123 - 2²⁶ = 1245904259 is a prime.

It is a super-2 number, since 2×1313013123² = 3448006922340426258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1313013096 and 1313013105.

It is not an unprimeable number, because it can be changed into a prime (1313013623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72945165 + ... + 72945182.

It is an arithmetic number, because the mean of its divisors is an integer number (316095754).

Almost surely, 2^1313013123 is an apocalyptic number.

1313013123 is a deficient number, since it is larger than the sum of its proper divisors (583561401).

1313013123 is a wasteful number, since it uses less digits than its factorization.

1313013123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145890353 (or 145890350 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1313013123 is about 36235.5229436530. The cubic root of 1313013123 is about 1095.0224477790.

Adding to 1313013123 its reverse (3213103131), we get a palindrome (4526116254).

The spelling of 1313013123 in words is "one billion, three hundred thirteen million, thirteen thousand, one hundred twenty-three".