30205009 has 2 divisors, whose sum is σ = 30205010. Its totient is φ = 30205008.

The previous prime is 30205001. The next prime is 30205027. The reversal of 30205009 is 90050203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27331984 + 2873025 = 5228^2 + 1695^2 .

It is an emirp because it is prime and its reverse (90050203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30205009 - 2³ = 30205001 is a prime.

It is not a weakly prime, because it can be changed into another prime (30205001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15102504 + 15102505.

It is an arithmetic number, because the mean of its divisors is an integer number (15102505).

Almost surely, 2^30205009 is an apocalyptic number.

It is an amenable number.

30205009 is a deficient number, since it is larger than the sum of its proper divisors (1).

30205009 is an equidigital number, since it uses as much as digits as its factorization.

30205009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 30205009 is about 5495.9083871549. The cubic root of 30205009 is about 311.4294340179.

The spelling of 30205009 in words is "thirty million, two hundred five thousand, nine".