30493 has 2 divisors, whose sum is σ = 30494. Its totient is φ = 30492.

The previous prime is 30491. The next prime is 30497. The reversal of 30493 is 39403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19044 + 11449 = 138^2 + 107^2 .

It is a cyclic number.

It is not a de Polignac number, because 30493 - 2¹ = 30491 is a prime.

Together with 30491, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 30493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15246 + 15247.

It is an arithmetic number, because the mean of its divisors is an integer number (15247).

2³⁰⁴⁹³ is an apocalyptic number.

It is an amenable number.

30493 is a deficient number, since it is larger than the sum of its proper divisors (1).

30493 is an equidigital number, since it uses as much as digits as its factorization.

30493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 30493 is about 174.6224498740. The cubic root of 30493 is about 31.2416084135.

Adding to 30493 its reverse (39403), we get a palindrome (69896).

The spelling of 30493 in words is "thirty thousand, four hundred ninety-three".