12198777 has 4 divisors (see below), whose sum is σ = 16265040. Its totient is φ = 8132516.

The previous prime is 12198773. The next prime is 12198787. The reversal of 12198777 is 77789121.

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.

It is a cyclic number.

It is not a de Polignac number, because 12198777 - 2² = 12198773 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12198773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033127 + ... + 2033132.

It is an arithmetic number, because the mean of its divisors is an integer number (4066260).

Almost surely, 2^12198777 is an apocalyptic number.

It is an amenable number.

12198777 is a deficient number, since it is larger than the sum of its proper divisors (4066263).

12198777 is an equidigital number, since it uses as much as digits as its factorization.

12198777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066262.

The product of its digits is 49392, while the sum is 42.

The square root of 12198777 is about 3492.6747629861. The cubic root of 12198777 is about 230.2000590780.

The spelling of 12198777 in words is "twelve million, one hundred ninety-eight thousand, seven hundred seventy-seven".