123321309 has 16 divisors (see below), whose sum is σ = 167476800. Its totient is φ = 80701056.

The previous prime is 123321299. The next prime is 123321313. The reversal of 123321309 is 903123321.

It is not a de Polignac number, because 123321309 - 2⁵ = 123321277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123321329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48922 + ... + 51380.

It is an arithmetic number, because the mean of its divisors is an integer number (10467300).

Almost surely, 2^123321309 is an apocalyptic number.

It is an amenable number.

123321309 is a deficient number, since it is larger than the sum of its proper divisors (44155491).

123321309 is a wasteful number, since it uses less digits than its factorization.

123321309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 123321309 is about 11105.0127870255. The cubic root of 123321309 is about 497.7516503350.

The spelling of 123321309 in words is "one hundred twenty-three million, three hundred twenty-one thousand, three hundred nine".