82372117 has 4 divisors (see below), whose sum is σ = 82925100. Its totient is φ = 81819136.

The previous prime is 82372111. The next prime is 82372127. The reversal of 82372117 is 71127328.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52330756 + 30041361 = 7234^2 + 5481^2 .

It is a cyclic number.

It is not a de Polignac number, because 82372117 - 2¹⁵ = 82339349 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 (82372111) 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, 276268 + ... + 276565.

It is an arithmetic number, because the mean of its divisors is an integer number (20731275).

Almost surely, 2^82372117 is an apocalyptic number.

It is an amenable number.

82372117 is a deficient number, since it is larger than the sum of its proper divisors (552983).

82372117 is a wasteful number, since it uses less digits than its factorization.

82372117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552982.

The product of its digits is 4704, while the sum is 31.

The square root of 82372117 is about 9075.9086046522. The cubic root of 82372117 is about 435.1043339819.

The spelling of 82372117 in words is "eighty-two million, three hundred seventy-two thousand, one hundred seventeen".