8613861 has 4 divisors (see below), whose sum is σ = 11485152. Its totient is φ = 5742572.

The previous prime is 8613853. The next prime is 8613863. The reversal of 8613861 is 1683168.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8613861 - 2³ = 8613853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8613863) 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, 1435641 + ... + 1435646.

It is an arithmetic number, because the mean of its divisors is an integer number (2871288).

Almost surely, 2^8613861 is an apocalyptic number.

It is an amenable number.

8613861 is a deficient number, since it is larger than the sum of its proper divisors (2871291).

8613861 is a wasteful number, since it uses less digits than its factorization.

8613861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871290.

The product of its digits is 6912, while the sum is 33.

The square root of 8613861 is about 2934.9379891234. The cubic root of 8613861 is about 204.9899737313.

The spelling of 8613861 in words is "eight million, six hundred thirteen thousand, eight hundred sixty-one".