13409491 has 2 divisors, whose sum is σ = 13409492. Its totient is φ = 13409490.

The previous prime is 13409441. The next prime is 13409531. The reversal of 13409491 is 19490431.

13409491 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (19490431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13409491 - 2⁹ = 13408979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13409401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6704745 + 6704746.

It is an arithmetic number, because the mean of its divisors is an integer number (6704746).

Almost surely, 2^13409491 is an apocalyptic number.

13409491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13409491 is an equidigital number, since it uses as much as digits as its factorization.

13409491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 13409491 is about 3661.8971858860. The cubic root of 13409491 is about 237.5768379266.

The spelling of 13409491 in words is "thirteen million, four hundred nine thousand, four hundred ninety-one".