30864881 has 2 divisors, whose sum is σ = 30864882. Its totient is φ = 30864880.

The previous prime is 30864839. The next prime is 30864887. The reversal of 30864881 is 18846803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17505856 + 13359025 = 4184^2 + 3655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30864881 is a prime.

It is a super-3 number, since 3×30864881³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30864887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15432440 + 15432441.

It is an arithmetic number, because the mean of its divisors is an integer number (15432441).

Almost surely, 2^30864881 is an apocalyptic number.

It is an amenable number.

30864881 is a deficient number, since it is larger than the sum of its proper divisors (1).

30864881 is an equidigital number, since it uses as much as digits as its factorization.

30864881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 30864881 is about 5555.6170674372. The cubic root of 30864881 is about 313.6809916853.

The spelling of 30864881 in words is "thirty million, eight hundred sixty-four thousand, eight hundred eighty-one".