13986197 has 4 divisors (see below), whose sum is σ = 14040876. Its totient is φ = 13931520.

The previous prime is 13986191. The next prime is 13986209. The reversal of 13986197 is 79168931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79168931 = 379 ⋅208889.

It can be written as a sum of positive squares in 2 ways, for example, as 13256881 + 729316 = 3641^2 + 854^2 .

It is a cyclic number.

It is not a de Polignac number, because 13986197 - 2⁸ = 13985941 is a prime.

It is a super-2 number, since 2×13986197² = 391227413045618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13986191) 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, 26954 + ... + 27467.

It is an arithmetic number, because the mean of its divisors is an integer number (3510219).

Almost surely, 2^13986197 is an apocalyptic number.

It is an amenable number.

13986197 is a deficient number, since it is larger than the sum of its proper divisors (54679).

13986197 is an equidigital number, since it uses as much as digits as its factorization.

13986197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54678.

The product of its digits is 81648, while the sum is 44.

The square root of 13986197 is about 3739.8124284515. The cubic root of 13986197 is about 240.9349927683.

The spelling of 13986197 in words is "thirteen million, nine hundred eighty-six thousand, one hundred ninety-seven".