82989447 has 4 divisors (see below), whose sum is σ = 110652600. Its totient is φ = 55326296.

The previous prime is 82989443. The next prime is 82989493. The reversal of 82989447 is 74498928.

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 82989447 - 2² = 82989443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82989447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82989443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13831572 + ... + 13831577.

It is an arithmetic number, because the mean of its divisors is an integer number (27663150).

Almost surely, 2^82989447 is an apocalyptic number.

82989447 is a deficient number, since it is larger than the sum of its proper divisors (27663153).

82989447 is a wasteful number, since it uses less digits than its factorization.

82989447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27663152.

The product of its digits is 1161216, while the sum is 51.

The square root of 82989447 is about 9109.8543896157. The cubic root of 82989447 is about 436.1885792407.

It can be divided in two parts, 82989 and 447, that added together give a triangular number (83436 = T₄₀₈).

The spelling of 82989447 in words is "eighty-two million, nine hundred eighty-nine thousand, four hundred forty-seven".