68286143 has 4 divisors (see below), whose sum is σ = 68784720. Its totient is φ = 67787568.

The previous prime is 68286137. The next prime is 68286181. The reversal of 68286143 is 34168286.

It is a happy number.

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 68286143 - 2¹⁸ = 68023999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68286097 and 68286106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68286343) 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, 249083 + ... + 249356.

It is an arithmetic number, because the mean of its divisors is an integer number (17196180).

Almost surely, 2^68286143 is an apocalyptic number.

68286143 is a deficient number, since it is larger than the sum of its proper divisors (498577).

68286143 is a wasteful number, since it uses less digits than its factorization.

68286143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498576.

The product of its digits is 55296, while the sum is 38.

The square root of 68286143 is about 8263.5430052732. The cubic root of 68286143 is about 408.7372271693.

The spelling of 68286143 in words is "sixty-eight million, two hundred eighty-six thousand, one hundred forty-three".