30605 has 4 divisors (see below), whose sum is σ = 36732. Its totient is φ = 24480.

The previous prime is 30593. The next prime is 30631. The reversal of 30605 is 50603.

30605 = 100² + 101² + 102².

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50603 = 7 ⋅7229.

It can be written as a sum of positive squares in 2 ways, for example, as 6889 + 23716 = 83^2 + 154^2 .

It is not a de Polignac number, because 30605 - 2¹⁰ = 29581 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 30605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3056 + ... + 3065.

It is an arithmetic number, because the mean of its divisors is an integer number (9183).

2³⁰⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

30605 is a deficient number, since it is larger than the sum of its proper divisors (6127).

30605 is an equidigital number, since it uses as much as digits as its factorization.

30605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6126.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 30605 is about 174.9428478104. The cubic root of 30605 is about 31.2798115516.

The spelling of 30605 in words is "thirty thousand, six hundred five".