7872197 has 4 divisors (see below), whose sum is σ = 7877856. Its totient is φ = 7866540.

The previous prime is 7872191. The next prime is 7872217. The reversal of 7872197 is 7912787.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7872197 - 2⁴ = 7872181 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 (7872191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872 + ... + 4062.

It is an arithmetic number, because the mean of its divisors is an integer number (1969464).

Almost surely, 2^7872197 is an apocalyptic number.

It is an amenable number.

7872197 is a deficient number, since it is larger than the sum of its proper divisors (5659).

7872197 is a wasteful number, since it uses less digits than its factorization.

7872197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5658.

The product of its digits is 49392, while the sum is 41.

The square root of 7872197 is about 2805.7435734578. The cubic root of 7872197 is about 198.9292527315.

The spelling of 7872197 in words is "seven million, eight hundred seventy-two thousand, one hundred ninety-seven".