30613 has 8 divisors (see below), whose sum is σ = 35136. Its totient is φ = 26620.

The previous prime is 30593. The next prime is 30631. The reversal of 30613 is 31603.

It is a de Polignac number, because none of the positive numbers 2^k-30613 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 30593 and 30602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1320 + ... + 1342.

It is an arithmetic number, because the mean of its divisors is an integer number (4392).

2³⁰⁶¹³ is an apocalyptic number.

It is an amenable number.

30613 is a deficient number, since it is larger than the sum of its proper divisors (4523).

30613 is an equidigital number, since it uses as much as digits as its factorization.

30613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 30613 is about 174.9657109265. The cubic root of 30613 is about 31.2825367784.

Subtracting 30613 from its reverse (31603), we obtain a triangular number (990 = T₄₄).

The spelling of 30613 in words is "thirty thousand, six hundred thirteen".