13495991 has 4 divisors (see below), whose sum is σ = 13961400. Its totient is φ = 13030584.

The previous prime is 13495969. The next prime is 13496033. The reversal of 13495991 is 19959431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13495991 - 2¹⁰ = 13494967 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 (13495931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232661 + ... + 232718.

It is an arithmetic number, because the mean of its divisors is an integer number (3490350).

Almost surely, 2^13495991 is an apocalyptic number.

13495991 is a deficient number, since it is larger than the sum of its proper divisors (465409).

13495991 is an equidigital number, since it uses as much as digits as its factorization.

13495991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465408.

The product of its digits is 43740, while the sum is 41.

The square root of 13495991 is about 3673.6890178675. The cubic root of 13495991 is about 238.0865854957.

The spelling of 13495991 in words is "thirteen million, four hundred ninety-five thousand, nine hundred ninety-one".