12987193 has 4 divisors (see below), whose sum is σ = 13021840. Its totient is φ = 12952548.

The previous prime is 12987179. The next prime is 12987199. The reversal of 12987193 is 39178921.

12987193 is digitally balanced in base 2 and base 3, because in such bases 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: 39178921 = 199 ⋅196879.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12987193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12987199) 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, 16755 + ... + 17512.

It is an arithmetic number, because the mean of its divisors is an integer number (3255460).

Almost surely, 2^12987193 is an apocalyptic number.

It is an amenable number.

12987193 is a deficient number, since it is larger than the sum of its proper divisors (34647).

12987193 is an equidigital number, since it uses as much as digits as its factorization.

12987193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34646.

The product of its digits is 27216, while the sum is 40.

The square root of 12987193 is about 3603.7748264840. The cubic root of 12987193 is about 235.0562291885.

The spelling of 12987193 in words is "twelve million, nine hundred eighty-seven thousand, one hundred ninety-three".