13198621 has 2 divisors, whose sum is σ = 13198622. Its totient is φ = 13198620.

The previous prime is 13198553. The next prime is 13198637. The reversal of 13198621 is 12689131.

13198621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7371225 + 5827396 = 2715^2 + 2414^2 .

It is a cyclic number.

It is not a de Polignac number, because 13198621 - 2⁹ = 13198109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13198651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6599310 + 6599311.

It is an arithmetic number, because the mean of its divisors is an integer number (6599311).

Almost surely, 2^13198621 is an apocalyptic number.

It is an amenable number.

13198621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13198621 is an equidigital number, since it uses as much as digits as its factorization.

13198621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 31.

The square root of 13198621 is about 3632.9906413312. The cubic root of 13198621 is about 236.3249199227.

The spelling of 13198621 in words is "thirteen million, one hundred ninety-eight thousand, six hundred twenty-one".