13968613 has 4 divisors (see below), whose sum is σ = 14575968. Its totient is φ = 13361260.

The previous prime is 13968607. The next prime is 13968637. The reversal of 13968613 is 31686931.

13968613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13968613 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 (13968653) 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, 303643 + ... + 303688.

It is an arithmetic number, because the mean of its divisors is an integer number (3643992).

Almost surely, 2^13968613 is an apocalyptic number.

It is an amenable number.

13968613 is a deficient number, since it is larger than the sum of its proper divisors (607355).

13968613 is an equidigital number, since it uses as much as digits as its factorization.

13968613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607354.

The product of its digits is 23328, while the sum is 37.

The square root of 13968613 is about 3737.4607690249. The cubic root of 13968613 is about 240.8339794233.

The spelling of 13968613 in words is "thirteen million, nine hundred sixty-eight thousand, six hundred thirteen".