13485991 has 4 divisors (see below), whose sum is σ = 14195800. Its totient is φ = 12776184.

The previous prime is 13485977. The next prime is 13486001. The reversal of 13485991 is 19958431.

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 13485991 - 2⁷ = 13485863 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 (13485931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354876 + ... + 354913.

It is an arithmetic number, because the mean of its divisors is an integer number (3548950).

Almost surely, 2^13485991 is an apocalyptic number.

13485991 is a deficient number, since it is larger than the sum of its proper divisors (709809).

13485991 is an equidigital number, since it uses as much as digits as its factorization.

13485991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709808.

The product of its digits is 38880, while the sum is 40.

The square root of 13485991 is about 3672.3277359190. The cubic root of 13485991 is about 238.0277666919.

The spelling of 13485991 in words is "thirteen million, four hundred eighty-five thousand, nine hundred ninety-one".