30533189 has 4 divisors (see below), whose sum is σ = 30813420. Its totient is φ = 30252960.

The previous prime is 30533183. The next prime is 30533197. The reversal of 30533189 is 98133503.

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 14668900 + 15864289 = 3830^2 + 3983^2 .

It is a cyclic number.

It is not a de Polignac number, because 30533189 - 2⁸ = 30532933 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 (30533183) 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, 139952 + ... + 140169.

It is an arithmetic number, because the mean of its divisors is an integer number (7703355).

Almost surely, 2^30533189 is an apocalyptic number.

It is an amenable number.

30533189 is a deficient number, since it is larger than the sum of its proper divisors (280231).

30533189 is a wasteful number, since it uses less digits than its factorization.

30533189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280230.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 30533189 is about 5525.6844824872. The cubic root of 30533189 is about 312.5532760368.

The spelling of 30533189 in words is "thirty million, five hundred thirty-three thousand, one hundred eighty-nine".