123456197 has 2 divisors, whose sum is σ = 123456198. Its totient is φ = 123456196.

The previous prime is 123456187. The next prime is 123456199. The reversal of 123456197 is 791654321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121903681 + 1552516 = 11041^2 + 1246^2 .

It is an emirp because it is prime and its reverse (791654321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123456197 - 2⁴ = 123456181 is a prime.

Together with 123456199, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123456197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123456199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61728098 + 61728099.

It is an arithmetic number, because the mean of its divisors is an integer number (61728099).

Almost surely, 2^123456197 is an apocalyptic number.

It is an amenable number.

123456197 is a deficient number, since it is larger than the sum of its proper divisors (1).

123456197 is an equidigital number, since it uses as much as digits as its factorization.

123456197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 123456197 is about 11111.0844205235. The cubic root of 123456197 is about 497.9330633194.

The spelling of 123456197 in words is "one hundred twenty-three million, four hundred fifty-six thousand, one hundred ninety-seven".