12173309 has 8 divisors (see below), whose sum is σ = 12974328. Its totient is φ = 11381760.

The previous prime is 12173303. The next prime is 12173321. The reversal of 12173309 is 90337121.

It can be written as a sum of positive squares in 4 ways, for example, as 1428025 + 10745284 = 1195^2 + 3278^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12173309 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 (12173303) 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 7 ways as a sum of consecutive naturals, for example, 389 + ... + 4949.

It is an arithmetic number, because the mean of its divisors is an integer number (1621791).

Almost surely, 2^12173309 is an apocalyptic number.

It is an amenable number.

12173309 is a deficient number, since it is larger than the sum of its proper divisors (801019).

12173309 is a wasteful number, since it uses less digits than its factorization.

12173309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4735.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 12173309 is about 3489.0269417131. The cubic root of 12173309 is about 230.0397473840.

The spelling of 12173309 in words is "twelve million, one hundred seventy-three thousand, three hundred nine".