13521197 has 2 divisors, whose sum is σ = 13521198. Its totient is φ = 13521196.

The previous prime is 13521149. The next prime is 13521253. The reversal of 13521197 is 79112531.

13521197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13147876 + 373321 = 3626^2 + 611^2 .

It is a cyclic number.

It is not a de Polignac number, because 13521197 - 2¹⁰ = 13520173 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 (13521107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760598 + 6760599.

It is an arithmetic number, because the mean of its divisors is an integer number (6760599).

Almost surely, 2^13521197 is an apocalyptic number.

It is an amenable number.

13521197 is a deficient number, since it is larger than the sum of its proper divisors (1).

13521197 is an equidigital number, since it uses as much as digits as its factorization.

13521197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 29.

The square root of 13521197 is about 3677.1180291092. The cubic root of 13521197 is about 238.2347153678.

The spelling of 13521197 in words is "thirteen million, five hundred twenty-one thousand, one hundred ninety-seven".