12684730173 has 4 divisors (see below), whose sum is σ = 16912973568. Its totient is φ = 8456486780.

The previous prime is 12684730159. The next prime is 12684730187. The reversal of 12684730173 is 37103748621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37103748621 = 3 ⋅12367916207.

It is an interprime number because it is at equal distance from previous prime (12684730159) and next prime (12684730187).

It is a cyclic number.

It is not a de Polignac number, because 12684730173 - 2⁶ = 12684730109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12684730103) 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 3 ways as a sum of consecutive naturals, for example, 2114121693 + ... + 2114121698.

It is an arithmetic number, because the mean of its divisors is an integer number (4228243392).

Almost surely, 2^12684730173 is an apocalyptic number.

It is an amenable number.

12684730173 is a deficient number, since it is larger than the sum of its proper divisors (4228243395).

12684730173 is an equidigital number, since it uses as much as digits as its factorization.

12684730173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4228243394.

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 12684730173 in words is "twelve billion, six hundred eighty-four million, seven hundred thirty thousand, one hundred seventy-three".