13091563 has 2 divisors, whose sum is σ = 13091564. Its totient is φ = 13091562.

The previous prime is 13091539. The next prime is 13091567. The reversal of 13091563 is 36519031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13091563 - 2¹⁷ = 12960491 is a prime.

It is not a weakly prime, because it can be changed into another prime (13091567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6545781 + 6545782.

It is an arithmetic number, because the mean of its divisors is an integer number (6545782).

Almost surely, 2^13091563 is an apocalyptic number.

13091563 is a deficient number, since it is larger than the sum of its proper divisors (1).

13091563 is an equidigital number, since it uses as much as digits as its factorization.

13091563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 13091563 is about 3618.2264992673. The cubic root of 13091563 is about 235.6842168824.

The spelling of 13091563 in words is "thirteen million, ninety-one thousand, five hundred sixty-three".