123868978 has 8 divisors (see below), whose sum is σ = 187540272. Its totient is φ = 61355556.

The previous prime is 123868967. The next prime is 123868991. The reversal of 123868978 is 879868321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289200 + ... + 289627.

It is an arithmetic number, because the mean of its divisors is an integer number (23442534).

Almost surely, 2^123868978 is an apocalyptic number.

123868978 is a deficient number, since it is larger than the sum of its proper divisors (63671294).

123868978 is a wasteful number, since it uses less digits than its factorization.

123868978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578936.

The product of its digits is 1161216, while the sum is 52.

The square root of 123868978 is about 11129.6441093145. The cubic root of 123868978 is about 498.4873993596.

The spelling of 123868978 in words is "one hundred twenty-three million, eight hundred sixty-eight thousand, nine hundred seventy-eight".