13090991 has 8 divisors (see below), whose sum is σ = 13322400. Its totient is φ = 12861792.

The previous prime is 13090967. The next prime is 13091041. The reversal of 13090991 is 19909031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13090991 - 2⁶ = 13090927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13092991) 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 in 7 ways as a sum of consecutive naturals, for example, 14921 + ... + 15773.

It is an arithmetic number, because the mean of its divisors is an integer number (1665300).

Almost surely, 2^13090991 is an apocalyptic number.

13090991 is a deficient number, since it is larger than the sum of its proper divisors (231409).

13090991 is a wasteful number, since it uses less digits than its factorization.

13090991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 13090991 is about 3618.1474541539. The cubic root of 13090991 is about 235.6807843069.

The spelling of 13090991 in words is "thirteen million, ninety thousand, nine hundred ninety-one".