86721143 has 4 divisors (see below), whose sum is σ = 86779608. Its totient is φ = 86662680.

The previous prime is 86721133. The next prime is 86721161. The reversal of 86721143 is 34112768.

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 86721143 - 2¹⁴ = 86704759 is a prime.

It is a super-3 number, since 3×86721143³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86721133) 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, 26948 + ... + 29993.

It is an arithmetic number, because the mean of its divisors is an integer number (21694902).

Almost surely, 2^86721143 is an apocalyptic number.

86721143 is a deficient number, since it is larger than the sum of its proper divisors (58465).

86721143 is a wasteful number, since it uses less digits than its factorization.

86721143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58464.

The product of its digits is 8064, while the sum is 32.

The square root of 86721143 is about 9312.4187513234. The cubic root of 86721143 is about 442.6308345181.

The spelling of 86721143 in words is "eighty-six million, seven hundred twenty-one thousand, one hundred forty-three".