8120863 has 4 divisors (see below), whose sum is σ = 8473968. Its totient is φ = 7767760.

The previous prime is 8120843. The next prime is 8120867. The reversal of 8120863 is 3680218.

8120863 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3680218 = 2 ⋅1840109.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8120863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8120867) 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, 176518 + ... + 176563.

It is an arithmetic number, because the mean of its divisors is an integer number (2118492).

Almost surely, 2^8120863 is an apocalyptic number.

8120863 is a deficient number, since it is larger than the sum of its proper divisors (353105).

8120863 is a wasteful number, since it uses less digits than its factorization.

8120863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353104.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 8120863 is about 2849.7127925459. The cubic root of 8120863 is about 201.0021616394.

The spelling of 8120863 in words is "eight million, one hundred twenty thousand, eight hundred sixty-three".