123686983 has 4 divisors (see below), whose sum is σ = 141356560. Its totient is φ = 106017408.

The previous prime is 123686977. The next prime is 123686999. The reversal of 123686983 is 389686321.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-123686983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123686083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8834778 + ... + 8834791.

It is an arithmetic number, because the mean of its divisors is an integer number (35339140).

Almost surely, 2^123686983 is an apocalyptic number.

123686983 is a deficient number, since it is larger than the sum of its proper divisors (17669577).

123686983 is an equidigital number, since it uses as much as digits as its factorization.

123686983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17669576.

The product of its digits is 373248, while the sum is 46.

The square root of 123686983 is about 11121.4649664511. The cubic root of 123686983 is about 498.2431448165.

The spelling of 123686983 in words is "one hundred twenty-three million, six hundred eighty-six thousand, nine hundred eighty-three".