123444320999 has 4 divisors (see below), whose sum is σ = 130705751664. Its totient is φ = 116182890336.

The previous prime is 123444320983. The next prime is 123444321029. The reversal of 123444320999 is 999023444321.

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 123444320999 - 2⁴ = 123444320983 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 (123444329999) 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, 3630715307 + ... + 3630715340.

It is an arithmetic number, because the mean of its divisors is an integer number (32676437916).

Almost surely, 2^123444320999 is an apocalyptic number.

123444320999 is a deficient number, since it is larger than the sum of its proper divisors (7261430665).

123444320999 is an equidigital number, since it uses as much as digits as its factorization.

123444320999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7261430664.

The product of its (nonzero) digits is 1679616, while the sum is 50.

The spelling of 123444320999 in words is "one hundred twenty-three billion, four hundred forty-four million, three hundred twenty thousand, nine hundred ninety-nine".