206454197 has 2 divisors, whose sum is σ = 206454198. Its totient is φ = 206454196.

The previous prime is 206454181. The next prime is 206454257. The reversal of 206454197 is 791454602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191158276 + 15295921 = 13826^2 + 3911^2 .

It is a cyclic number.

It is not a de Polignac number, because 206454197 - 2⁴ = 206454181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206454197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206454107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103227098 + 103227099.

It is an arithmetic number, because the mean of its divisors is an integer number (103227099).

Almost surely, 2^206454197 is an apocalyptic number.

It is an amenable number.

206454197 is a deficient number, since it is larger than the sum of its proper divisors (1).

206454197 is an equidigital number, since it uses as much as digits as its factorization.

206454197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 206454197 is about 14368.5140846227. The cubic root of 206454197 is about 591.0277948416.

It can be divided in two parts, 20645 and 4197, that added together give a palindrome (24842).

The spelling of 206454197 in words is "two hundred six million, four hundred fifty-four thousand, one hundred ninety-seven".