123718879 has 2 divisors, whose sum is σ = 123718880. Its totient is φ = 123718878.

The previous prime is 123718871. The next prime is 123718883. The reversal of 123718879 is 978817321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123718879 - 2³ = 123718871 is a prime.

It is a super-2 number, since 2×123718879² = 30612722042033282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123718871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61859439 + 61859440.

It is an arithmetic number, because the mean of its divisors is an integer number (61859440).

Almost surely, 2^123718879 is an apocalyptic number.

123718879 is a deficient number, since it is larger than the sum of its proper divisors (1).

123718879 is an equidigital number, since it uses as much as digits as its factorization.

123718879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 46.

The square root of 123718879 is about 11122.8988577619. The cubic root of 123718879 is about 498.2859695803.

The spelling of 123718879 in words is "one hundred twenty-three million, seven hundred eighteen thousand, eight hundred seventy-nine".