82170995 has 4 divisors (see below), whose sum is σ = 98605200. Its totient is φ = 65736792.

The previous prime is 82170989. The next prime is 82171009. The reversal of 82170995 is 59907128.

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-82170995 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8217095 + ... + 8217104.

It is an arithmetic number, because the mean of its divisors is an integer number (24651300).

Almost surely, 2^82170995 is an apocalyptic number.

82170995 is a deficient number, since it is larger than the sum of its proper divisors (16434205).

82170995 is a wasteful number, since it uses less digits than its factorization.

82170995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16434204.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 82170995 is about 9064.8218404997. The cubic root of 82170995 is about 434.7499245235.

The spelling of 82170995 in words is "eighty-two million, one hundred seventy thousand, nine hundred ninety-five".