13600921 has 2 divisors, whose sum is σ = 13600922. Its totient is φ = 13600920.

The previous prime is 13600871. The next prime is 13600927. The reversal of 13600921 is 12900631.

13600921 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., 9455625 + 4145296 = 3075^2 + 2036^2 .

It is a cyclic number.

It is not a de Polignac number, because 13600921 - 2¹¹ = 13598873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13600892 and 13600901.

It is not a weakly prime, because it can be changed into another prime (13600927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6800460 + 6800461.

It is an arithmetic number, because the mean of its divisors is an integer number (6800461).

Almost surely, 2^13600921 is an apocalyptic number.

It is an amenable number.

13600921 is a deficient number, since it is larger than the sum of its proper divisors (1).

13600921 is an equidigital number, since it uses as much as digits as its factorization.

13600921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 13600921 is about 3687.9426513979. The cubic root of 13600921 is about 238.7020264894.

The spelling of 13600921 in words is "thirteen million, six hundred thousand, nine hundred twenty-one".