82172863 has 8 divisors (see below), whose sum is σ = 85129200. Its totient is φ = 79224768.

The previous prime is 82172861. The next prime is 82172903. The reversal of 82172863 is 36827128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82172863 - 2¹ = 82172861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82172861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24003 + ... + 27211.

It is an arithmetic number, because the mean of its divisors is an integer number (10641150).

Almost surely, 2^82172863 is an apocalyptic number.

82172863 is a deficient number, since it is larger than the sum of its proper divisors (2956337).

82172863 is a wasteful number, since it uses less digits than its factorization.

82172863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4121.

The product of its digits is 32256, while the sum is 37.

The square root of 82172863 is about 9064.9248755850. The cubic root of 82172863 is about 434.7532189005.

The spelling of 82172863 in words is "eighty-two million, one hundred seventy-two thousand, eight hundred sixty-three".