12173897 has 4 divisors (see below), whose sum is σ = 12192660. Its totient is φ = 12155136.

The previous prime is 12173891. The next prime is 12173899. The reversal of 12173897 is 79837121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7946761 + 4227136 = 2819^2 + 2056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12173897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12173897.

It is not an unprimeable number, because it can be changed into a prime (12173891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8372 + ... + 9717.

It is an arithmetic number, because the mean of its divisors is an integer number (3048165).

Almost surely, 2^12173897 is an apocalyptic number.

It is an amenable number.

12173897 is a deficient number, since it is larger than the sum of its proper divisors (18763).

12173897 is an equidigital number, since it uses as much as digits as its factorization.

12173897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18762.

The product of its digits is 21168, while the sum is 38.

The square root of 12173897 is about 3489.1112048773. Note that the first 3 decimals coincide. The cubic root of 12173897 is about 230.0434511481.

The spelling of 12173897 in words is "twelve million, one hundred seventy-three thousand, eight hundred ninety-seven".