30839921 has 8 divisors (see below), whose sum is σ = 37319040. Its totient is φ = 24879168.

The previous prime is 30839909. The next prime is 30839929. The reversal of 30839921 is 12993803.

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

It is a cyclic number.

It is not a de Polignac number, because 30839921 - 2⁶ = 30839857 is a prime.

It is a super-2 number, since 2×30839921² = 1902201454572482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30839929) 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, 129461 + ... + 129698.

It is an arithmetic number, because the mean of its divisors is an integer number (4664880).

Almost surely, 2^30839921 is an apocalyptic number.

It is an amenable number.

30839921 is a deficient number, since it is larger than the sum of its proper divisors (6479119).

30839921 is a wasteful number, since it uses less digits than its factorization.

30839921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259183.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 30839921 is about 5553.3702379726. The cubic root of 30839921 is about 313.5964123967.

The spelling of 30839921 in words is "thirty million, eight hundred thirty-nine thousand, nine hundred twenty-one".