861136313 has 4 divisors (see below), whose sum is σ = 861833700. Its totient is φ = 860438928.

The previous prime is 861136301. The next prime is 861136319. The reversal of 861136313 is 313631168.

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

It can be written as a sum of positive squares in 2 ways, for example, as 423824569 + 437311744 = 20587^2 + 20912^2 .

It is a cyclic number.

It is not a de Polignac number, because 861136313 - 2⁶ = 861136249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 861136313.

It is not an unprimeable number, because it can be changed into a prime (861136319) 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, 346838 + ... + 349311.

It is an arithmetic number, because the mean of its divisors is an integer number (215458425).

Almost surely, 2^861136313 is an apocalyptic number.

It is an amenable number.

861136313 is a deficient number, since it is larger than the sum of its proper divisors (697387).

861136313 is a wasteful number, since it uses less digits than its factorization.

861136313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697386.

The product of its digits is 7776, while the sum is 32.

The square root of 861136313 is about 29345.1241776211. The cubic root of 861136313 is about 951.3871933740.

The spelling of 861136313 in words is "eight hundred sixty-one million, one hundred thirty-six thousand, three hundred thirteen".