30923 has 6 divisors (see below), whose sum is σ = 33156. Its totient is φ = 28832.

The previous prime is 30911. The next prime is 30931. The reversal of 30923 is 32903.

It is a happy number.

It is not a de Polignac number, because 30923 - 2⁶ = 30859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236 + ... + 342.

It is an arithmetic number, because the mean of its divisors is an integer number (5526).

2³⁰⁹²³ is an apocalyptic number.

30923 is a deficient number, since it is larger than the sum of its proper divisors (2233).

30923 is a wasteful number, since it uses less digits than its factorization.

30923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 30923 is about 175.8493673574. The cubic root of 30923 is about 31.3877756789.

The spelling of 30923 in words is "thirty thousand, nine hundred twenty-three".