9313131313 has 4 divisors (see below), whose sum is σ = 9375635700. Its totient is φ = 9250626928.

The previous prime is 9313131299. The next prime is 9313131329. The reversal of 9313131313 is 3131313139.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3131313139 = 67 ⋅46736017.

It can be written as a sum of positive squares in 2 ways, for example, as 590878864 + 8722252449 = 24308^2 + 93393^2 .

It is a cyclic number.

It is not a de Polignac number, because 9313131313 - 2⁵ = 9313131281 is a prime.

It is a super-2 number, since 2×9313131313² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9313161313) 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, 31251970 + ... + 31252267.

It is an arithmetic number, because the mean of its divisors is an integer number (2343908925).

Almost surely, 2^9313131313 is an apocalyptic number.

It is an amenable number.

9313131313 is a deficient number, since it is larger than the sum of its proper divisors (62504387).

9313131313 is a wasteful number, since it uses less digits than its factorization.

9313131313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62504386.

The product of its digits is 2187, while the sum is 28.

The square root of 9313131313 is about 96504.5662805652. The cubic root of 9313131313 is about 2103.9330158651.

The spelling of 9313131313 in words is "nine billion, three hundred thirteen million, one hundred thirty-one thousand, three hundred thirteen".