123383987 has 4 divisors (see below), whose sum is σ = 123410880. Its totient is φ = 123357096.

The previous prime is 123383971. The next prime is 123384007. The reversal of 123383987 is 789383321.

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

It is a cyclic number.

It is not a de Polignac number, because 123383987 - 2⁴ = 123383971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123383087) 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, 4643 + ... + 16380.

It is an arithmetic number, because the mean of its divisors is an integer number (30852720).

Almost surely, 2^123383987 is an apocalyptic number.

123383987 is a deficient number, since it is larger than the sum of its proper divisors (26893).

123383987 is an equidigital number, since it uses as much as digits as its factorization.

123383987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26892.

The product of its digits is 217728, while the sum is 44.

The square root of 123383987 is about 11107.8344874237. The cubic root of 123383987 is about 497.8359634036.

The spelling of 123383987 in words is "one hundred twenty-three million, three hundred eighty-three thousand, nine hundred eighty-seven".