86643023 has 4 divisors (see below), whose sum is σ = 86666328. Its totient is φ = 86619720.

The previous prime is 86642987. The next prime is 86643049. The reversal of 86643023 is 32034668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86643023 - 2¹² = 86638927 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 (86643223) 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, 4688 + ... + 13973.

It is an arithmetic number, because the mean of its divisors is an integer number (21666582).

Almost surely, 2^86643023 is an apocalyptic number.

86643023 is a deficient number, since it is larger than the sum of its proper divisors (23305).

86643023 is a wasteful number, since it uses less digits than its factorization.

86643023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23304.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 86643023 is about 9308.2234072888. The cubic root of 86643023 is about 442.4978845909.

The spelling of 86643023 in words is "eighty-six million, six hundred forty-three thousand, twenty-three".