123959798 has 16 divisors (see below), whose sum is σ = 191733696. Its totient is φ = 60070920.

The previous prime is 123959791. The next prime is 123959809. The reversal of 123959798 is 897959321.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123959791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5765 + ... + 16767.

It is an arithmetic number, because the mean of its divisors is an integer number (11983356).

Almost surely, 2^123959798 is an apocalyptic number.

123959798 is a deficient number, since it is larger than the sum of its proper divisors (67773898).

123959798 is a wasteful number, since it uses less digits than its factorization.

123959798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11179.

The product of its digits is 1224720, while the sum is 53.

The square root of 123959798 is about 11133.7234562387. The cubic root of 123959798 is about 498.6091989318.

The spelling of 123959798 in words is "one hundred twenty-three million, nine hundred fifty-nine thousand, seven hundred ninety-eight".