123678987 has 8 divisors (see below), whose sum is σ = 165064704. Its totient is φ = 82372968.

The previous prime is 123678979. The next prime is 123679013. The reversal of 123678987 is 789876321.

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

It is not a de Polignac number, because 123678987 - 2³ = 123678979 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (123678917) 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, 16203 + ... + 22580.

It is an arithmetic number, because the mean of its divisors is an integer number (20633088).

Almost surely, 2^123678987 is an apocalyptic number.

123678987 is a deficient number, since it is larger than the sum of its proper divisors (41385717).

123678987 is a wasteful number, since it uses less digits than its factorization.

123678987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39849.

The product of its digits is 1016064, while the sum is 51.

The square root of 123678987 is about 11121.1054756261. The cubic root of 123678987 is about 498.2324079334.

The spelling of 123678987 in words is "one hundred twenty-three million, six hundred seventy-eight thousand, nine hundred eighty-seven".