30863 has 4 divisors (see below), whose sum is σ = 35280. Its totient is φ = 26448.

The previous prime is 30859. The next prime is 30869. The reversal of 30863 is 36803.

30863 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30863 - 2^{2} = 30859 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number *n* which divided by its sum of digits gives 30863.

It is not an unprimeable number, because it can be changed into a prime (30869) 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, 2198 + ... + 2211.

It is an arithmetic number, because the mean of its divisors is an integer number (8820).

2^{30863} is an apocalyptic number.

30863 is a deficient number, since it is larger than the sum of its proper divisors (4417).

30863 is an equidigital number, since it uses as much as digits as its factorization.

30863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30863 is about 175.6786839659. The cubic root of 30863 is about 31.3674619330.

The spelling of 30863 in words is "thirty thousand, eight hundred sixty-three".

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