30505109 has 4 divisors (see below), whose sum is σ = 30609516. Its totient is φ = 30400704.

The previous prime is 30505099. The next prime is 30505121. The reversal of 30505109 is 90150503.

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 18464209 + 12040900 = 4297^2 + 3470^2 .

It is a cyclic number.

It is not a de Polignac number, because 30505109 - 2¹⁶ = 30439573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30505159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51764 + ... + 52349.

It is an arithmetic number, because the mean of its divisors is an integer number (7652379).

Almost surely, 2^30505109 is an apocalyptic number.

It is an amenable number.

30505109 is a deficient number, since it is larger than the sum of its proper divisors (104407).

30505109 is a wasteful number, since it uses less digits than its factorization.

30505109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104406.

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 30505109 is about 5523.1430363517. The cubic root of 30505109 is about 312.4574329220.

The spelling of 30505109 in words is "thirty million, five hundred five thousand, one hundred nine".