123979903 has 2 divisors, whose sum is σ = 123979904. Its totient is φ = 123979902.

The previous prime is 123979897. The next prime is 123979907. The reversal of 123979903 is 309979321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123979903 - 2⁹ = 123979391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123979903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123979907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61989951 + 61989952.

It is an arithmetic number, because the mean of its divisors is an integer number (61989952).

Almost surely, 2^123979903 is an apocalyptic number.

123979903 is a deficient number, since it is larger than the sum of its proper divisors (1).

123979903 is an equidigital number, since it uses as much as digits as its factorization.

123979903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 123979903 is about 11134.6263071555. The cubic root of 123979903 is about 498.6361538968.

The spelling of 123979903 in words is "one hundred twenty-three million, nine hundred seventy-nine thousand, nine hundred three".