2113613 has 4 divisors (see below), whose sum is σ = 2124540. Its totient is φ = 2102688.

The previous prime is 2113609. The next prime is 2113651. The reversal of 2113613 is 3163112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1885129 + 228484 = 1373^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113613 - 2² = 2113609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2113591 and 2113600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113603) 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, 5168 + ... + 5561.

It is an arithmetic number, because the mean of its divisors is an integer number (531135).

2^2113613 is an apocalyptic number.

It is an amenable number.

2113613 is a deficient number, since it is larger than the sum of its proper divisors (10927).

2113613 is a wasteful number, since it uses less digits than its factorization.

2113613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10926.

The product of its digits is 108, while the sum is 17.

The square root of 2113613 is about 1453.8270185961. The cubic root of 2113613 is about 128.3340274695.

Adding to 2113613 its reverse (3163112), we get a palindrome (5276725).

The spelling of 2113613 in words is "two million, one hundred thirteen thousand, six hundred thirteen".