13985613 has 12 divisors (see below), whose sum is σ = 20240220. Its totient is φ = 9305856.

The previous prime is 13985603. The next prime is 13985617. The reversal of 13985613 is 31658931.

It is a happy number.

13985613 is a `hidden beast` number, since 1 + 3 + 98 + 561 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8311689 + 5673924 = 2883^2 + 2382^2 .

It is not a de Polignac number, because 13985613 - 2⁴ = 13985597 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13985617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4903 + ... + 7211.

It is an arithmetic number, because the mean of its divisors is an integer number (1686685).

Almost surely, 2^13985613 is an apocalyptic number.

It is an amenable number.

13985613 is a deficient number, since it is larger than the sum of its proper divisors (6254607).

13985613 is a wasteful number, since it uses less digits than its factorization.

13985613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988 (or 2985 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 13985613 is about 3739.7343488542. The cubic root of 13985613 is about 240.9316392716.

The spelling of 13985613 in words is "thirteen million, nine hundred eighty-five thousand, six hundred thirteen".