13481591 has 2 divisors, whose sum is σ = 13481592. Its totient is φ = 13481590.

The previous prime is 13481569. The next prime is 13481597. The reversal of 13481591 is 19518431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13481591 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 (13481597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6740795 + 6740796.

It is an arithmetic number, because the mean of its divisors is an integer number (6740796).

Almost surely, 2^13481591 is an apocalyptic number.

13481591 is a deficient number, since it is larger than the sum of its proper divisors (1).

13481591 is an equidigital number, since it uses as much as digits as its factorization.

13481591 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 13481591 is about 3671.7286119756. The cubic root of 13481591 is about 238.0018772067.

The spelling of 13481591 in words is "thirteen million, four hundred eighty-one thousand, five hundred ninety-one".