13679861 has 8 divisors (see below), whose sum is σ = 14841624. Its totient is φ = 12533760.

The previous prime is 13679833. The next prime is 13679873. The reversal of 13679861 is 16897631.

It can be written as a sum of positive squares in 4 ways, for example, as 1562500 + 12117361 = 1250^2 + 3481^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13679861 - 2⁶ = 13679797 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 (13679821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2060 + ... + 5621.

It is an arithmetic number, because the mean of its divisors is an integer number (1855203).

Almost surely, 2^13679861 is an apocalyptic number.

It is an amenable number.

13679861 is a deficient number, since it is larger than the sum of its proper divisors (1161763).

13679861 is a wasteful number, since it uses less digits than its factorization.

13679861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7831.

The product of its digits is 54432, while the sum is 41.

The square root of 13679861 is about 3698.6296110857. The cubic root of 13679861 is about 239.1629462501.

It can be divided in two parts, 136 and 79861, that added together give a palindrome (79997).

The spelling of 13679861 in words is "thirteen million, six hundred seventy-nine thousand, eight hundred sixty-one".