13181091 has 32 divisors (see below), whose sum is σ = 22437888. Its totient is φ = 6683040.

The previous prime is 13181083. The next prime is 13181123. The reversal of 13181091 is 19018131.

It is not a de Polignac number, because 13181091 - 2³ = 13181083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13181491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9270 + ... + 10596.

It is an arithmetic number, because the mean of its divisors is an integer number (701184).

Almost surely, 2^13181091 is an apocalyptic number.

13181091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13181091 is a deficient number, since it is larger than the sum of its proper divisors (9256797).

13181091 is a wasteful number, since it uses less digits than its factorization.

13181091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

The product of its (nonzero) digits is 216, while the sum is 24.

The square root of 13181091 is about 3630.5772268332. The cubic root of 13181091 is about 236.2202470860.

The spelling of 13181091 in words is "thirteen million, one hundred eighty-one thousand, ninety-one".