172143197 has 2 divisors, whose sum is σ = 172143198. Its totient is φ = 172143196.

The previous prime is 172143163. The next prime is 172143227. The reversal of 172143197 is 791341271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103103716 + 69039481 = 10154^2 + 8309^2 .

It is a cyclic number.

It is not a de Polignac number, because 172143197 - 2⁸ = 172142941 is a prime.

It is a Chen prime.

It is equal to p_9616256 and since 172143197 and 9616256 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172143107) 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, 86071598 + 86071599.

It is an arithmetic number, because the mean of its divisors is an integer number (86071599).

Almost surely, 2^172143197 is an apocalyptic number.

It is an amenable number.

172143197 is a deficient number, since it is larger than the sum of its proper divisors (1).

172143197 is an equidigital number, since it uses as much as digits as its factorization.

172143197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 35.

The square root of 172143197 is about 13120.3352472412. The cubic root of 172143197 is about 556.2840673997.

The spelling of 172143197 in words is "one hundred seventy-two million, one hundred forty-three thousand, one hundred ninety-seven".