863143845 has 16 divisors (see below), whose sum is σ = 1383297792. Its totient is φ = 459587520.

The previous prime is 863143783. The next prime is 863143933. The reversal of 863143845 is 548341368.

It is not a de Polignac number, because 863143845 - 2¹⁰ = 863142821 is a prime.

It is a super-2 number, since 2×863143845² = 1490034594322768050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 863143797 and 863143806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37741 + ... + 56130.

It is an arithmetic number, because the mean of its divisors is an integer number (86456112).

Almost surely, 2^863143845 is an apocalyptic number.

It is an amenable number.

863143845 is a deficient number, since it is larger than the sum of its proper divisors (520153947).

863143845 is a wasteful number, since it uses less digits than its factorization.

863143845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94492.

The product of its digits is 276480, while the sum is 42.

The square root of 863143845 is about 29379.3098114983. The cubic root of 863143845 is about 952.1259296758.

The spelling of 863143845 in words is "eight hundred sixty-three million, one hundred forty-three thousand, eight hundred forty-five".