861773313 has 16 divisors (see below), whose sum is σ = 1165522176. Its totient is φ = 566301840.

The previous prime is 861773303. The next prime is 861773321. The reversal of 861773313 is 313377168.

861773313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 861773313 - 2²⁰ = 860724737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861773303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112578 + ... + 119988.

It is an arithmetic number, because the mean of its divisors is an integer number (72845136).

Almost surely, 2^861773313 is an apocalyptic number.

861773313 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

861773313 is a deficient number, since it is larger than the sum of its proper divisors (303748863).

861773313 is a wasteful number, since it uses less digits than its factorization.

861773313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7964.

The product of its digits is 63504, while the sum is 39.

The square root of 861773313 is about 29355.9757630367. The cubic root of 861773313 is about 951.6217223572.

The spelling of 861773313 in words is "eight hundred sixty-one million, seven hundred seventy-three thousand, three hundred thirteen".