201243197 has 2 divisors, whose sum is σ = 201243198. Its totient is φ = 201243196.

The previous prime is 201243191. The next prime is 201243233. The reversal of 201243197 is 791342102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190964761 + 10278436 = 13819^2 + 3206^2 .

It is a cyclic number.

It is not a de Polignac number, because 201243197 - 2²² = 197048893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201243191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100621598 + 100621599.

It is an arithmetic number, because the mean of its divisors is an integer number (100621599).

Almost surely, 2^201243197 is an apocalyptic number.

It is an amenable number.

201243197 is a deficient number, since it is larger than the sum of its proper divisors (1).

201243197 is an equidigital number, since it uses as much as digits as its factorization.

201243197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 201243197 is about 14186.0211828405. The cubic root of 201243197 is about 586.0127556465.

Adding to 201243197 its reverse (791342102), we get a palindrome (992585299).

The spelling of 201243197 in words is "two hundred one million, two hundred forty-three thousand, one hundred ninety-seven".