12199717 has 4 divisors (see below), whose sum is σ = 12371616. Its totient is φ = 12027820.

The previous prime is 12199697. The next prime is 12199721. The reversal of 12199717 is 71799121.

12199717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 71799121 = 43 ⋅1669747.

It is a cyclic number.

It is not a de Polignac number, because 12199717 - 2¹⁵ = 12166949 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 (12199757) 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, 85843 + ... + 85984.

It is an arithmetic number, because the mean of its divisors is an integer number (3092904).

Almost surely, 2^12199717 is an apocalyptic number.

It is an amenable number.

12199717 is a deficient number, since it is larger than the sum of its proper divisors (171899).

12199717 is an equidigital number, since it uses as much as digits as its factorization.

12199717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171898.

The product of its digits is 7938, while the sum is 37.

The square root of 12199717 is about 3492.8093277475. The cubic root of 12199717 is about 230.2059717609.

The spelling of 12199717 in words is "twelve million, one hundred ninety-nine thousand, seven hundred seventeen".