30985923 has 8 divisors (see below), whose sum is σ = 41363200. Its totient is φ = 20632968.

The previous prime is 30985921. The next prime is 30985931. The reversal of 30985923 is 32958903.

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

It is not a de Polignac number, because 30985923 - 2¹ = 30985921 is a prime.

It is the 5567-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30985921) by changing a digit.

It is a nontrivial repunit in base 5566.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2863 + ... + 8376.

It is an arithmetic number, because the mean of its divisors is an integer number (5170400).

Almost surely, 2^30985923 is an apocalyptic number.

30985923 is a deficient number, since it is larger than the sum of its proper divisors (10377277).

30985923 is a wasteful number, since it uses less digits than its factorization.

30985923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12161.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 30985923 is about 5566.5000673673. The cubic root of 30985923 is about 314.0905083459.

The spelling of 30985923 in words is "thirty million, nine hundred eighty-five thousand, nine hundred twenty-three".