123243947 has 2 divisors, whose sum is σ = 123243948. Its totient is φ = 123243946.

The previous prime is 123243943. The next prime is 123244007. The reversal of 123243947 is 749342321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123243947 - 2² = 123243943 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123243943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61621973 + 61621974.

It is an arithmetic number, because the mean of its divisors is an integer number (61621974).

Almost surely, 2^123243947 is an apocalyptic number.

123243947 is a deficient number, since it is larger than the sum of its proper divisors (1).

123243947 is an equidigital number, since it uses as much as digits as its factorization.

123243947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 123243947 is about 11101.5290388306. The cubic root of 123243947 is about 497.6475452716.

The spelling of 123243947 in words is "one hundred twenty-three million, two hundred forty-three thousand, nine hundred forty-seven".