11998197 has 6 divisors (see below), whose sum is σ = 17330742. Its totient is φ = 7998792.

The previous prime is 11998187. The next prime is 11998201. The reversal of 11998197 is 79189911.

11998197 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10536516 + 1461681 = 3246^2 + 1209^2 .

It is not a de Polignac number, because 11998197 - 2¹⁴ = 11981813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11998127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 666558 + ... + 666575.

It is an arithmetic number, because the mean of its divisors is an integer number (2888457).

Almost surely, 2^11998197 is an apocalyptic number.

It is an amenable number.

11998197 is a deficient number, since it is larger than the sum of its proper divisors (5332545).

11998197 is a wasteful number, since it uses less digits than its factorization.

11998197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333139 (or 1333136 counting only the distinct ones).

The product of its digits is 40824, while the sum is 45.

The square root of 11998197 is about 3463.8413647279. The cubic root of 11998197 is about 228.9313817154.

The spelling of 11998197 in words is "eleven million, nine hundred ninety-eight thousand, one hundred ninety-seven".