30656189 has 2 divisors, whose sum is σ = 30656190. Its totient is φ = 30656188.

The previous prime is 30656183. The next prime is 30656191. The reversal of 30656189 is 98165603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30063289 + 592900 = 5483^2 + 770^2 .

It is a cyclic number.

It is not a de Polignac number, because 30656189 - 2¹⁶ = 30590653 is a prime.

It is a Sophie Germain prime.

Together with 30656191, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p_1896077 and since 30656189 and 1896077 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30656183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15328094 + 15328095.

It is an arithmetic number, because the mean of its divisors is an integer number (15328095).

Almost surely, 2^30656189 is an apocalyptic number.

It is an amenable number.

30656189 is a deficient number, since it is larger than the sum of its proper divisors (1).

30656189 is an equidigital number, since it uses as much as digits as its factorization.

30656189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 30656189 is about 5536.8031389964. The cubic root of 30656189 is about 312.9724106104.

The spelling of 30656189 in words is "thirty million, six hundred fifty-six thousand, one hundred eighty-nine".