123111797 has 4 divisors (see below), whose sum is σ = 123178860. Its totient is φ = 123044736.

The previous prime is 123111787. The next prime is 123111803. The reversal of 123111797 is 797111321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18438436 + 104673361 = 4294^2 + 10231^2 .

It is a cyclic number.

It is not a de Polignac number, because 123111797 - 2²⁴ = 106334581 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 (123111787) 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, 30698 + ... + 34475.

It is an arithmetic number, because the mean of its divisors is an integer number (30794715).

Almost surely, 2^123111797 is an apocalyptic number.

It is an amenable number.

123111797 is a deficient number, since it is larger than the sum of its proper divisors (67063).

123111797 is an equidigital number, since it uses as much as digits as its factorization.

123111797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67062.

The product of its digits is 2646, while the sum is 32.

The square root of 123111797 is about 11095.5755596544. The cubic root of 123111797 is about 497.4696118742.

The spelling of 123111797 in words is "one hundred twenty-three million, one hundred eleven thousand, seven hundred ninety-seven".