123609323493 has 12 divisors (see below), whose sum is σ = 178549989228. Its totient is φ = 82404744000.

The previous prime is 123609323489. The next prime is 123609323521. The reversal of 123609323493 is 394323906321.

123609323493 is a `hidden beast` number, since 1 + 2 + 3 + 609 + 3 + 2 + 34 + 9 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 80319527649 + 43289795844 = 283407^2 + 208062^2 .

It is not a de Polignac number, because 123609323493 - 2² = 123609323489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123609323443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 699121 + ... + 857897.

It is an arithmetic number, because the mean of its divisors is an integer number (14879165769).

Almost surely, 2^123609323493 is an apocalyptic number.

It is an amenable number.

123609323493 is a deficient number, since it is larger than the sum of its proper divisors (54940665735).

123609323493 is a wasteful number, since it uses less digits than its factorization.

123609323493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245284 (or 245281 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 45.

The spelling of 123609323493 in words is "one hundred twenty-three billion, six hundred nine million, three hundred twenty-three thousand, four hundred ninety-three".