82840143 has 4 divisors (see below), whose sum is σ = 110453528. Its totient is φ = 55226760.

The previous prime is 82840139. The next prime is 82840157. The reversal of 82840143 is 34104828.

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

It is not a de Polignac number, because 82840143 - 2² = 82840139 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 82840143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82840103) 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, 13806688 + ... + 13806693.

It is an arithmetic number, because the mean of its divisors is an integer number (27613382).

Almost surely, 2^82840143 is an apocalyptic number.

82840143 is a deficient number, since it is larger than the sum of its proper divisors (27613385).

82840143 is a wasteful number, since it uses less digits than its factorization.

82840143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27613384.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 82840143 is about 9101.6560581028. The cubic root of 82840143 is about 435.9268439810.

The spelling of 82840143 in words is "eighty-two million, eight hundred forty thousand, one hundred forty-three".