30813089 has 2 divisors, whose sum is σ = 30813090. Its totient is φ = 30813088.

The previous prime is 30813071. The next prime is 30813091. The reversal of 30813089 is 98031803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28944400 + 1868689 = 5380^2 + 1367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30813089 is a prime.

Together with 30813091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30813019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15406544 + 15406545.

It is an arithmetic number, because the mean of its divisors is an integer number (15406545).

Almost surely, 2^30813089 is an apocalyptic number.

It is an amenable number.

30813089 is a deficient number, since it is larger than the sum of its proper divisors (1).

30813089 is an equidigital number, since it uses as much as digits as its factorization.

30813089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 30813089 is about 5550.9538819918. The cubic root of 30813089 is about 313.5054387480.

The spelling of 30813089 in words is "thirty million, eight hundred thirteen thousand, eighty-nine".