123193879 has 2 divisors, whose sum is σ = 123193880. Its totient is φ = 123193878.

The previous prime is 123193877. The next prime is 123193913. The reversal of 123193879 is 978391321.

It is a weak prime.

It is an emirp because it is prime and its reverse (978391321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123193879 - 2¹ = 123193877 is a prime.

Together with 123193877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123193877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61596939 + 61596940.

It is an arithmetic number, because the mean of its divisors is an integer number (61596940).

Almost surely, 2^123193879 is an apocalyptic number.

123193879 is a deficient number, since it is larger than the sum of its proper divisors (1).

123193879 is an equidigital number, since it uses as much as digits as its factorization.

123193879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 123193879 is about 11099.2738050739. The cubic root of 123193879 is about 497.5801461748.

The spelling of 123193879 in words is "one hundred twenty-three million, one hundred ninety-three thousand, eight hundred seventy-nine".