82572197 has 4 divisors (see below), whose sum is σ = 84803916. Its totient is φ = 80340480.

The previous prime is 82572167. The next prime is 82572199. The reversal of 82572197 is 79127528.

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 58767556 + 23804641 = 7666^2 + 4879^2 .

It is a cyclic number.

It is not a de Polignac number, because 82572197 - 2¹⁴ = 82555813 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 (82572199) 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, 1115804 + ... + 1115877.

It is an arithmetic number, because the mean of its divisors is an integer number (21200979).

Almost surely, 2^82572197 is an apocalyptic number.

It is an amenable number.

82572197 is a deficient number, since it is larger than the sum of its proper divisors (2231719).

82572197 is a wasteful number, since it uses less digits than its factorization.

82572197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231718.

The product of its digits is 70560, while the sum is 41.

The square root of 82572197 is about 9086.9245072247. The cubic root of 82572197 is about 435.4563353138.

The spelling of 82572197 in words is "eighty-two million, five hundred seventy-two thousand, one hundred ninety-seven".