123197 has 4 divisors (see below), whose sum is σ = 123900. Its totient is φ = 122496.

The previous prime is 123191. The next prime is 123203. The reversal of 123197 is 791321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (123191) and next prime (123203).

It can be written as a sum of positive squares in 2 ways, for example, as 70756 + 52441 = 266^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 123197 - 2¹⁰ = 122173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173 + ... + 525.

It is an arithmetic number, because the mean of its divisors is an integer number (30975).

2¹²³¹⁹⁷ is an apocalyptic number.

It is an amenable number.

123197 is a deficient number, since it is larger than the sum of its proper divisors (703).

123197 is an equidigital number, since it uses as much as digits as its factorization.

123197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702.

The product of its digits is 378, while the sum is 23.

The square root of 123197 is about 350.9943019481. The cubic root of 123197 is about 49.7584348046.

The spelling of 123197 in words is "one hundred twenty-three thousand, one hundred ninety-seven".