27830197 has 2 divisors, whose sum is σ = 27830198. Its totient is φ = 27830196.

The previous prime is 27830191. The next prime is 27830221. The reversal of 27830197 is 79103872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25867396 + 1962801 = 5086^2 + 1401^2 .

It is a cyclic number.

It is not a de Polignac number, because 27830197 - 2³ = 27830189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27830191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13915098 + 13915099.

It is an arithmetic number, because the mean of its divisors is an integer number (13915099).

Almost surely, 2^27830197 is an apocalyptic number.

It is an amenable number.

27830197 is a deficient number, since it is larger than the sum of its proper divisors (1).

27830197 is an equidigital number, since it uses as much as digits as its factorization.

27830197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 27830197 is about 5275.4333471289. The cubic root of 27830197 is about 303.0438165276.

The spelling of 27830197 in words is "twenty-seven million, eight hundred thirty thousand, one hundred ninety-seven".