30681163 has 2 divisors, whose sum is σ = 30681164. Its totient is φ = 30681162.

The previous prime is 30681139. The next prime is 30681173. The reversal of 30681163 is 36118603.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30681163 is a prime.

It is not a weakly prime, because it can be changed into another prime (30681173) 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, 15340581 + 15340582.

It is an arithmetic number, because the mean of its divisors is an integer number (15340582).

Almost surely, 2^30681163 is an apocalyptic number.

30681163 is a deficient number, since it is larger than the sum of its proper divisors (1).

30681163 is an equidigital number, since it uses as much as digits as its factorization.

30681163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 30681163 is about 5539.0579523959. The cubic root of 30681163 is about 313.0573749816.

Adding to 30681163 its reverse (36118603), we get a palindrome (66799766).

The spelling of 30681163 in words is "thirty million, six hundred eighty-one thousand, one hundred sixty-three".