30800909 has 4 divisors (see below), whose sum is σ = 31633404. Its totient is φ = 29968416.

The previous prime is 30800899. The next prime is 30800911. The reversal of 30800909 is 90900803.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13118884 + 17682025 = 3622^2 + 4205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30800909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30800989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416192 + ... + 416265.

It is an arithmetic number, because the mean of its divisors is an integer number (7908351).

Almost surely, 2^30800909 is an apocalyptic number.

It is an amenable number.

30800909 is a deficient number, since it is larger than the sum of its proper divisors (832495).

30800909 is an equidigital number, since it uses as much as digits as its factorization.

30800909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832494.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 30800909 is about 5549.8566648158. The cubic root of 30800909 is about 313.4641251417.

The spelling of 30800909 in words is "thirty million, eight hundred thousand, nine hundred nine".