30643 has 2 divisors, whose sum is σ = 30644. Its totient is φ = 30642.

The previous prime is 30637. The next prime is 30649. The reversal of 30643 is 34603.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (30637) and next prime (30649).

It is an emirp because it is prime and its reverse (34603) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30643 is a prime.

30643 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (30649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15321 + 15322.

It is an arithmetic number, because the mean of its divisors is an integer number (15322).

2³⁰⁶⁴³ is an apocalyptic number.

30643 is a deficient number, since it is larger than the sum of its proper divisors (1).

30643 is an equidigital number, since it uses as much as digits as its factorization.

30643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 30643 is about 175.0514210168. The cubic root of 30643 is about 31.2927521521.

The spelling of 30643 in words is "thirty thousand, six hundred forty-three".