27198197 has 8 divisors (see below), whose sum is σ = 29346744. Its totient is φ = 25057728.

The previous prime is 27198179. The next prime is 27198203. The reversal of 27198197 is 79189172.

It can be written as a sum of positive squares in 4 ways, for example, as 303601 + 26894596 = 551^2 + 5186^2 .

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 27198197 - 2⁸ = 27197941 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 (27198107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6263 + ... + 9675.

It is an arithmetic number, because the mean of its divisors is an integer number (3668343).

Almost surely, 2^27198197 is an apocalyptic number.

It is an amenable number.

27198197 is a deficient number, since it is larger than the sum of its proper divisors (2148547).

27198197 is a wasteful number, since it uses less digits than its factorization.

27198197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039.

The product of its digits is 63504, while the sum is 44.

The square root of 27198197 is about 5215.1890665632. The cubic root of 27198197 is about 300.7322740908.

The spelling of 27198197 in words is "twenty-seven million, one hundred ninety-eight thousand, one hundred ninety-seven".