123979198 has 16 divisors (see below), whose sum is σ = 225038304. Its totient is φ = 50008320.

The previous prime is 123979183. The next prime is 123979201. The reversal of 123979198 is 891979321.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 260223 + ... + 260698.

It is an arithmetic number, because the mean of its divisors is an integer number (14064894).

Almost surely, 2^123979198 is an apocalyptic number.

123979198 is a deficient number, since it is larger than the sum of its proper divisors (101059106).

123979198 is a wasteful number, since it uses less digits than its factorization.

123979198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520947.

The product of its digits is 244944, while the sum is 49.

The square root of 123979198 is about 11134.5946491105. The cubic root of 123979198 is about 498.6352087458.

The spelling of 123979198 in words is "one hundred twenty-three million, nine hundred seventy-nine thousand, one hundred ninety-eight".