82987943 has 4 divisors (see below), whose sum is σ = 83015808. Its totient is φ = 82960080.

The previous prime is 82987921. The next prime is 82987951. The reversal of 82987943 is 34978928.

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 82987943 - 2¹² = 82983847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82987891 and 82987900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82987903) 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, 8846 + ... + 15627.

It is an arithmetic number, because the mean of its divisors is an integer number (20753952).

Almost surely, 2^82987943 is an apocalyptic number.

82987943 is a deficient number, since it is larger than the sum of its proper divisors (27865).

82987943 is a wasteful number, since it uses less digits than its factorization.

82987943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27864.

The product of its digits is 870912, while the sum is 50.

The square root of 82987943 is about 9109.7718412702. The cubic root of 82987943 is about 436.1859442407.

The spelling of 82987943 in words is "eighty-two million, nine hundred eighty-seven thousand, nine hundred forty-three".