30200809 has 2 divisors, whose sum is σ = 30200810. Its totient is φ = 30200808.

The previous prime is 30200801. The next prime is 30200827. The reversal of 30200809 is 90800203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27405225 + 2795584 = 5235^2 + 1672^2 .

It is a cyclic number.

It is not a de Polignac number, because 30200809 - 2³ = 30200801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30200809.

It is not a weakly prime, because it can be changed into another prime (30200801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15100404 + 15100405.

It is an arithmetic number, because the mean of its divisors is an integer number (15100405).

Almost surely, 2^30200809 is an apocalyptic number.

It is an amenable number.

30200809 is a deficient number, since it is larger than the sum of its proper divisors (1).

30200809 is an equidigital number, since it uses as much as digits as its factorization.

30200809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 30200809 is about 5495.5262714321. The cubic root of 30200809 is about 311.4149986169.

The spelling of 30200809 in words is "thirty million, two hundred thousand, eight hundred nine".