123987727 has 4 divisors (see below), whose sum is σ = 124138120. Its totient is φ = 123837336.

The previous prime is 123987719. The next prime is 123987737. The reversal of 123987727 is 727789321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 727789321 = 7 ⋅103969903.

It is a cyclic number.

It is not a de Polignac number, because 123987727 - 2³ = 123987719 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 (123987737) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 73953 + ... + 75610.

It is an arithmetic number, because the mean of its divisors is an integer number (31034530).

Almost surely, 2^123987727 is an apocalyptic number.

123987727 is a deficient number, since it is larger than the sum of its proper divisors (150393).

123987727 is an equidigital number, since it uses as much as digits as its factorization.

123987727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150392.

The product of its digits is 296352, while the sum is 46.

The square root of 123987727 is about 11134.9776380557. The cubic root of 123987727 is about 498.6466428204.

The spelling of 123987727 in words is "one hundred twenty-three million, nine hundred eighty-seven thousand, seven hundred twenty-seven".