123768929 has 2 divisors, whose sum is σ = 123768930. Its totient is φ = 123768928.

The previous prime is 123768923. The next prime is 123768937. The reversal of 123768929 is 929867321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87142225 + 36626704 = 9335^2 + 6052^2 .

It is an emirp because it is prime and its reverse (929867321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123768929 - 2²⁴ = 106991713 is a prime.

It is not a weakly prime, because it can be changed into another prime (123768923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61884464 + 61884465.

It is an arithmetic number, because the mean of its divisors is an integer number (61884465).

Almost surely, 2^123768929 is an apocalyptic number.

It is an amenable number.

123768929 is a deficient number, since it is larger than the sum of its proper divisors (1).

123768929 is an equidigital number, since it uses as much as digits as its factorization.

123768929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 123768929 is about 11125.1484933910. The cubic root of 123768929 is about 498.3531537501.

The spelling of 123768929 in words is "one hundred twenty-three million, seven hundred sixty-eight thousand, nine hundred twenty-nine".