13861613 has 4 divisors (see below), whose sum is σ = 14677020. Its totient is φ = 13046208.

The previous prime is 13861607. The next prime is 13861633. The reversal of 13861613 is 31616831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31616831 = 67 ⋅471893.

It can be written as a sum of positive squares in 2 ways, for example, as 3736489 + 10125124 = 1933^2 + 3182^2 .

It is not a de Polignac number, because 13861613 - 2¹⁰ = 13860589 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 (13861633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407678 + ... + 407711.

It is an arithmetic number, because the mean of its divisors is an integer number (3669255).

Almost surely, 2^13861613 is an apocalyptic number.

It is an amenable number.

13861613 is a deficient number, since it is larger than the sum of its proper divisors (815407).

13861613 is an equidigital number, since it uses as much as digits as its factorization.

13861613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815406.

The product of its digits is 2592, while the sum is 29.

The square root of 13861613 is about 3723.1187195683. The cubic root of 13861613 is about 240.2174707083.

The spelling of 13861613 in words is "thirteen million, eight hundred sixty-one thousand, six hundred thirteen".