123766321 has 4 divisors (see below), whose sum is σ = 141447232. Its totient is φ = 106085412.

The previous prime is 123766303. The next prime is 123766333. The reversal of 123766321 is 123667321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123766321 - 2¹⁵ = 123733553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123766351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8840445 + ... + 8840458.

It is an arithmetic number, because the mean of its divisors is an integer number (35361808).

Almost surely, 2^123766321 is an apocalyptic number.

It is an amenable number.

123766321 is a deficient number, since it is larger than the sum of its proper divisors (17680911).

123766321 is an equidigital number, since it uses as much as digits as its factorization.

123766321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17680910.

The product of its digits is 9072, while the sum is 31.

The square root of 123766321 is about 11125.0312808549. The cubic root of 123766321 is about 498.3496533720.

The spelling of 123766321 in words is "one hundred twenty-three million, seven hundred sixty-six thousand, three hundred twenty-one".