13194581 has 2 divisors, whose sum is σ = 13194582. Its totient is φ = 13194580.

The previous prime is 13194563. The next prime is 13194589. The reversal of 13194581 is 18549131.

13194581 is digitally balanced in base 2 and base 3, because in such bases 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., 7236100 + 5958481 = 2690^2 + 2441^2 .

It is a cyclic number.

It is not a de Polignac number, because 13194581 - 2¹⁴ = 13178197 is a prime.

It is a super-2 number, since 2×13194581² = 348193935531122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13194589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6597290 + 6597291.

It is an arithmetic number, because the mean of its divisors is an integer number (6597291).

Almost surely, 2^13194581 is an apocalyptic number.

It is an amenable number.

13194581 is a deficient number, since it is larger than the sum of its proper divisors (1).

13194581 is an equidigital number, since it uses as much as digits as its factorization.

13194581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 32.

The square root of 13194581 is about 3632.4345830311. The cubic root of 13194581 is about 236.3008050270.

The spelling of 13194581 in words is "thirteen million, one hundred ninety-four thousand, five hundred eighty-one".