13545691 has 2 divisors, whose sum is σ = 13545692. Its totient is φ = 13545690.

The previous prime is 13545647. The next prime is 13545709. The reversal of 13545691 is 19654531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13545691 - 2²¹ = 11448539 is a prime.

It is equal to p₈₈₂₃₉₄ and since 13545691 and 882394 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13545391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6772845 + 6772846.

It is an arithmetic number, because the mean of its divisors is an integer number (6772846).

Almost surely, 2^13545691 is an apocalyptic number.

13545691 is a deficient number, since it is larger than the sum of its proper divisors (1).

13545691 is an equidigital number, since it uses as much as digits as its factorization.

13545691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 34.

The square root of 13545691 is about 3680.4471195766. The cubic root of 13545691 is about 238.3784847162.

The spelling of 13545691 in words is "thirteen million, five hundred forty-five thousand, six hundred ninety-one".