213386197 has 2 divisors, whose sum is σ = 213386198. Its totient is φ = 213386196.

The previous prime is 213386191. The next prime is 213386221. The reversal of 213386197 is 791683312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204089796 + 9296401 = 14286^2 + 3049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213386197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213386191) 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 as a sum of consecutive naturals, namely, 106693098 + 106693099.

It is an arithmetic number, because the mean of its divisors is an integer number (106693099).

Almost surely, 2^213386197 is an apocalyptic number.

It is an amenable number.

213386197 is a deficient number, since it is larger than the sum of its proper divisors (1).

213386197 is an equidigital number, since it uses as much as digits as its factorization.

213386197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 213386197 is about 14607.7444186295. The cubic root of 213386197 is about 597.5699836912.

The spelling of 213386197 in words is "two hundred thirteen million, three hundred eighty-six thousand, one hundred ninety-seven".