30123023 has 4 divisors (see below), whose sum is σ = 34426320. Its totient is φ = 25819728.

The previous prime is 30123019. The next prime is 30123047. The reversal of 30123023 is 32032103.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30123023 - 2² = 30123019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30122989 and 30123007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30123053) 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, 2151638 + ... + 2151651.

It is an arithmetic number, because the mean of its divisors is an integer number (8606580).

Almost surely, 2^30123023 is an apocalyptic number.

30123023 is a deficient number, since it is larger than the sum of its proper divisors (4303297).

30123023 is an equidigital number, since it uses as much as digits as its factorization.

30123023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4303296.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 30123023 is about 5488.4444973052. Note that the first 4 decimals coincide. The cubic root of 30123023 is about 311.1474058516.

Adding to 30123023 its reverse (32032103), we get a palindrome (62155126).

The spelling of 30123023 in words is "thirty million, one hundred twenty-three thousand, twenty-three".