202143197 has 2 divisors, whose sum is σ = 202143198. Its totient is φ = 202143196.

The previous prime is 202143181. The next prime is 202143199. The reversal of 202143197 is 791341202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201242596 + 900601 = 14186^2 + 949^2 .

It is a cyclic number.

It is not a de Polignac number, because 202143197 - 2⁴ = 202143181 is a prime.

Together with 202143199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202143199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101071598 + 101071599.

It is an arithmetic number, because the mean of its divisors is an integer number (101071599).

Almost surely, 2^202143197 is an apocalyptic number.

It is an amenable number.

202143197 is a deficient number, since it is larger than the sum of its proper divisors (1).

202143197 is an equidigital number, since it uses as much as digits as its factorization.

202143197 is an odious number, because the sum of its binary digits is odd.

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

The square root of 202143197 is about 14217.7071639558. The cubic root of 202143197 is about 586.8850455020.

Adding to 202143197 its reverse (791341202), we get a palindrome (993484399).

The spelling of 202143197 in words is "two hundred two million, one hundred forty-three thousand, one hundred ninety-seven".