12188977 has 4 divisors (see below), whose sum is σ = 12263920. Its totient is φ = 12114036.

The previous prime is 12188951. The next prime is 12188999. The reversal of 12188977 is 77988121.

It is a happy number.

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: 77988121 = 3803 ⋅20507.

It is a cyclic number.

It is not a de Polignac number, because 12188977 - 2²³ = 3800369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12188927) 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, 37227 + ... + 37552.

It is an arithmetic number, because the mean of its divisors is an integer number (3065980).

Almost surely, 2^12188977 is an apocalyptic number.

It is an amenable number.

12188977 is a deficient number, since it is larger than the sum of its proper divisors (74943).

12188977 is an equidigital number, since it uses as much as digits as its factorization.

12188977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74942.

The product of its digits is 56448, while the sum is 43.

The square root of 12188977 is about 3491.2715448673. The cubic root of 12188977 is about 230.1383981163.

It can be divided in two parts, 121 and 88977, that added together give a palindrome (89098).

The spelling of 12188977 in words is "twelve million, one hundred eighty-eight thousand, nine hundred seventy-seven".