16613 has 4 divisors (see below), whose sum is σ = 17100. Its totient is φ = 16128.

The previous prime is 16607. The next prime is 16619. The reversal of 16613 is 31661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31661 = 7 ⋅4523.

It is an interprime number because it is at equal distance from previous prime (16607) and next prime (16619).

It can be written as a sum of positive squares in 2 ways, for example, as 12769 + 3844 = 113^2 + 62^2 .

It is a cyclic number.

It is not a de Polignac number, because 16613 - 2¹² = 12517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16591 and 16600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16619) 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, 188 + ... + 261.

It is an arithmetic number, because the mean of its divisors is an integer number (4275).

2¹⁶⁶¹³ is an apocalyptic number.

It is an amenable number.

16613 is a deficient number, since it is larger than the sum of its proper divisors (487).

16613 is an equidigital number, since it uses as much as digits as its factorization.

16613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486.

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

The square root of 16613 is about 128.8914271781. The cubic root of 16613 is about 25.5162014177.

The spelling of 16613 in words is "sixteen thousand, six hundred thirteen".