1313136751 has 4 divisors (see below), whose sum is σ = 1316183904. Its totient is φ = 1310089600.

The previous prime is 1313136749. The next prime is 1313136757. The reversal of 1313136751 is 1576313131.

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

It is a cyclic number.

It is not a de Polignac number, because 1313136751 - 2¹ = 1313136749 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313136757) 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, 1522930 + ... + 1523791.

It is an arithmetic number, because the mean of its divisors is an integer number (329045976).

Almost surely, 2^1313136751 is an apocalyptic number.

1313136751 is a deficient number, since it is larger than the sum of its proper divisors (3047153).

1313136751 is an equidigital number, since it uses as much as digits as its factorization.

1313136751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3047152.

The product of its digits is 5670, while the sum is 31.

The square root of 1313136751 is about 36237.2287985712. The cubic root of 1313136751 is about 1095.0568143273.

Adding to 1313136751 its reverse (1576313131), we get a palindrome (2889449882).

The spelling of 1313136751 in words is "one billion, three hundred thirteen million, one hundred thirty-six thousand, seven hundred fifty-one".