123943679 has 2 divisors, whose sum is σ = 123943680. Its totient is φ = 123943678.

The previous prime is 123943667. The next prime is 123943681. The reversal of 123943679 is 976349321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123943679 - 2¹² = 123939583 is a prime.

It is a Sophie Germain prime.

Together with 123943681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123943609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61971839 + 61971840.

It is an arithmetic number, because the mean of its divisors is an integer number (61971840).

Almost surely, 2^123943679 is an apocalyptic number.

123943679 is a deficient number, since it is larger than the sum of its proper divisors (1).

123943679 is an equidigital number, since it uses as much as digits as its factorization.

123943679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 44.

The square root of 123943679 is about 11132.9995508847. Note that the first 3 decimals coincide. The cubic root of 123943679 is about 498.5875859298.

The spelling of 123943679 in words is "one hundred twenty-three million, nine hundred forty-three thousand, six hundred seventy-nine".