82989823 has 4 divisors (see below), whose sum is σ = 94845520. Its totient is φ = 71134128.

The previous prime is 82989817. The next prime is 82989839. The reversal of 82989823 is 32898928.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82989823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82989323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5927838 + ... + 5927851.

It is an arithmetic number, because the mean of its divisors is an integer number (23711380).

Almost surely, 2^82989823 is an apocalyptic number.

82989823 is a deficient number, since it is larger than the sum of its proper divisors (11855697).

82989823 is a wasteful number, since it uses less digits than its factorization.

82989823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11855696.

The product of its digits is 497664, while the sum is 49.

The square root of 82989823 is about 9109.8750265852. The cubic root of 82989823 is about 436.1892379857.

It can be divided in two parts, 829898 and 23, that added together give a square (829921 = 911²).

The spelling of 82989823 in words is "eighty-two million, nine hundred eighty-nine thousand, eight hundred twenty-three".