123866843 has 2 divisors, whose sum is σ = 123866844. Its totient is φ = 123866842.

The previous prime is 123866839. The next prime is 123866849. The reversal of 123866843 is 348668321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123866843 - 2² = 123866839 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123866843.

It is not a weakly prime, because it can be changed into another prime (123866849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61933421 + 61933422.

It is an arithmetic number, because the mean of its divisors is an integer number (61933422).

Almost surely, 2^123866843 is an apocalyptic number.

123866843 is a deficient number, since it is larger than the sum of its proper divisors (1).

123866843 is an equidigital number, since it uses as much as digits as its factorization.

123866843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 41.

The square root of 123866843 is about 11129.5481938846. The cubic root of 123866843 is about 498.4845353746.

The spelling of 123866843 in words is "one hundred twenty-three million, eight hundred sixty-six thousand, eight hundred forty-three".