30900209 has 8 divisors (see below), whose sum is σ = 31321728. Its totient is φ = 30481360.

The previous prime is 30900193. The next prime is 30900229. The reversal of 30900209 is 90200903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30900209 - 2⁴ = 30900193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30900229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33464 + ... + 34374.

It is an arithmetic number, because the mean of its divisors is an integer number (3915216).

Almost surely, 2^30900209 is an apocalyptic number.

It is an amenable number.

30900209 is a deficient number, since it is larger than the sum of its proper divisors (421519).

30900209 is a wasteful number, since it uses less digits than its factorization.

30900209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 30900209 is about 5558.7956429428. The cubic root of 30900209 is about 313.8006260005.

The spelling of 30900209 in words is "thirty million, nine hundred thousand, two hundred nine".