13491679 has 4 divisors (see below), whose sum is σ = 13778784. Its totient is φ = 13204576.

The previous prime is 13491677. The next prime is 13491689. The reversal of 13491679 is 97619431.

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 13491679 - 2¹ = 13491677 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13491677) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143482 + ... + 143575.

It is an arithmetic number, because the mean of its divisors is an integer number (3444696).

Almost surely, 2^13491679 is an apocalyptic number.

13491679 is a deficient number, since it is larger than the sum of its proper divisors (287105).

13491679 is an equidigital number, since it uses as much as digits as its factorization.

13491679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287104.

The product of its digits is 40824, while the sum is 40.

The square root of 13491679 is about 3673.1020949601. The cubic root of 13491679 is about 238.0612263918.

The spelling of 13491679 in words is "thirteen million, four hundred ninety-one thousand, six hundred seventy-nine".