30445909 has 4 divisors (see below), whose sum is σ = 32787916. Its totient is φ = 28103904.

The previous prime is 30445907. The next prime is 30445913. The reversal of 30445909 is 90954403.

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 6874884 + 23571025 = 2622^2 + 4855^2 .

It is a cyclic number.

It is not a de Polignac number, because 30445909 - 2¹ = 30445907 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 (30445907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1170984 + ... + 1171009.

It is an arithmetic number, because the mean of its divisors is an integer number (8196979).

Almost surely, 2^30445909 is an apocalyptic number.

It is an amenable number.

30445909 is a deficient number, since it is larger than the sum of its proper divisors (2342007).

30445909 is a wasteful number, since it uses less digits than its factorization.

30445909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342006.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 30445909 is about 5517.7811663748. The cubic root of 30445909 is about 312.2551776352.

The spelling of 30445909 in words is "thirty million, four hundred forty-five thousand, nine hundred nine".