123687243 has 14 divisors (see below), whose sum is σ = 185447124. Its totient is φ = 82457676.

The previous prime is 123687229. The next prime is 123687259. The reversal of 123687243 is 342786321.

It is a happy number.

It is not a de Polignac number, because 123687243 - 2⁵ = 123687211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123687198 and 123687207.

It is not an unprimeable number, because it can be changed into a prime (123687203) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 84105 + ... + 85562.

Almost surely, 2^123687243 is an apocalyptic number.

123687243 is a deficient number, since it is larger than the sum of its proper divisors (61759881).

123687243 is an frugal number, since it uses more digits than its factorization.

123687243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169685 (or 169670 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 123687243 is about 11121.4766555525. The cubic root of 123687243 is about 498.2434939320.

The spelling of 123687243 in words is "one hundred twenty-three million, six hundred eighty-seven thousand, two hundred forty-three".