82947143 has 4 divisors (see below), whose sum is σ = 82989048. Its totient is φ = 82905240.

The previous prime is 82947133. The next prime is 82947167. The reversal of 82947143 is 34174928.

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 82947143 - 2⁴ = 82947127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82947097 and 82947106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82947133) 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, 17828 + ... + 21993.

It is an arithmetic number, because the mean of its divisors is an integer number (20747262).

Almost surely, 2^82947143 is an apocalyptic number.

82947143 is a deficient number, since it is larger than the sum of its proper divisors (41905).

82947143 is a wasteful number, since it uses less digits than its factorization.

82947143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41904.

The product of its digits is 48384, while the sum is 38.

The square root of 82947143 is about 9107.5322124053. The cubic root of 82947143 is about 436.1144507075.

The spelling of 82947143 in words is "eighty-two million, nine hundred forty-seven thousand, one hundred forty-three".