13491879 has 4 divisors (see below), whose sum is σ = 17989176. Its totient is φ = 8994584.

The previous prime is 13491871. The next prime is 13491887. The reversal of 13491879 is 97819431.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (13491871) and next prime (13491887).

It is a cyclic number.

It is not a de Polignac number, because 13491879 - 2³ = 13491871 is a prime.

It is a super-3 number, since 3×13491879³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13491879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13491871) 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, 2248644 + ... + 2248649.

It is an arithmetic number, because the mean of its divisors is an integer number (4497294).

Almost surely, 2^13491879 is an apocalyptic number.

13491879 is a deficient number, since it is larger than the sum of its proper divisors (4497297).

13491879 is an equidigital number, since it uses as much as digits as its factorization.

13491879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4497296.

The product of its digits is 54432, while the sum is 42.

The square root of 13491879 is about 3673.1293198035. The cubic root of 13491879 is about 238.0624027221.

The spelling of 13491879 in words is "thirteen million, four hundred ninety-one thousand, eight hundred seventy-nine".