13491806 has 4 divisors (see below), whose sum is σ = 20237712. Its totient is φ = 6745902.

The previous prime is 13491743. The next prime is 13491811. The reversal of 13491806 is 60819431.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3372950 + ... + 3372953.

It is an arithmetic number, because the mean of its divisors is an integer number (5059428).

Almost surely, 2^13491806 is an apocalyptic number.

13491806 is a deficient number, since it is larger than the sum of its proper divisors (6745906).

13491806 is an equidigital number, since it uses as much as digits as its factorization.

13491806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6745905.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 13491806 is about 3673.1193827590. The cubic root of 13491806 is about 238.0619733629.

The spelling of 13491806 in words is "thirteen million, four hundred ninety-one thousand, eight hundred six".