30939081 has 8 divisors (see below), whose sum is σ = 41289024. Its totient is φ = 20607600.

The previous prime is 30939053. The next prime is 30939101. The reversal of 30939081 is 18093903.

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

It is not a de Polignac number, because 30939081 - 2⁹ = 30938569 is a prime.

It is a super-2 number, since 2×30939081² = 1914453466249122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30939001) 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 7 ways as a sum of consecutive naturals, for example, 61 + ... + 7866.

It is an arithmetic number, because the mean of its divisors is an integer number (5161128).

Almost surely, 2^30939081 is an apocalyptic number.

It is an amenable number.

30939081 is a deficient number, since it is larger than the sum of its proper divisors (10349943).

30939081 is a wasteful number, since it uses less digits than its factorization.

30939081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9231.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 30939081 is about 5562.2909848371. The cubic root of 30939081 is about 313.9321563570.

The spelling of 30939081 in words is "thirty million, nine hundred thirty-nine thousand, eighty-one".