86143973 has 4 divisors (see below), whose sum is σ = 86822400. Its totient is φ = 85465548.

The previous prime is 86143961. The next prime is 86144021. The reversal of 86143973 is 37934168.

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 86143973 - 2²⁰ = 85095397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86143973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86143273) 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, 339023 + ... + 339276.

It is an arithmetic number, because the mean of its divisors is an integer number (21705600).

Almost surely, 2^86143973 is an apocalyptic number.

It is an amenable number.

86143973 is a deficient number, since it is larger than the sum of its proper divisors (678427).

86143973 is a wasteful number, since it uses less digits than its factorization.

86143973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678426.

The product of its digits is 108864, while the sum is 41.

The square root of 86143973 is about 9281.3777533295. The cubic root of 86143973 is about 441.6466757931.

The spelling of 86143973 in words is "eighty-six million, one hundred forty-three thousand, nine hundred seventy-three".