13620197 has 2 divisors, whose sum is σ = 13620198. Its totient is φ = 13620196.

The previous prime is 13620151. The next prime is 13620199. The reversal of 13620197 is 79102631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7474756 + 6145441 = 2734^2 + 2479^2 .

It is an emirp because it is prime and its reverse (79102631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13620197 - 2⁶ = 13620133 is a prime.

Together with 13620199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13620199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6810098 + 6810099.

It is an arithmetic number, because the mean of its divisors is an integer number (6810099).

Almost surely, 2^13620197 is an apocalyptic number.

It is an amenable number.

13620197 is a deficient number, since it is larger than the sum of its proper divisors (1).

13620197 is an equidigital number, since it uses as much as digits as its factorization.

13620197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 13620197 is about 3690.5551072975. Note that the first 3 decimals coincide. The cubic root of 13620197 is about 238.8147406277.

The spelling of 13620197 in words is "thirteen million, six hundred twenty thousand, one hundred ninety-seven".