86143643 has 4 divisors (see below), whose sum is σ = 86162208. Its totient is φ = 86125080.

The previous prime is 86143639. The next prime is 86143657. The reversal of 86143643 is 34634168.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 86143643 - 2² = 86143639 is a prime.

It is a super-2 number, since 2×86143643² = 14841454458622898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86143613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4478 + ... + 13868.

It is an arithmetic number, because the mean of its divisors is an integer number (21540552).

Almost surely, 2^86143643 is an apocalyptic number.

86143643 is a deficient number, since it is larger than the sum of its proper divisors (18565).

86143643 is an equidigital number, since it uses as much as digits as its factorization.

86143643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18564.

The product of its digits is 41472, while the sum is 35.

The square root of 86143643 is about 9281.3599757794. The cubic root of 86143643 is about 441.6461118396.

The spelling of 86143643 in words is "eighty-six million, one hundred forty-three thousand, six hundred forty-three".