30123073 has 4 divisors (see below), whose sum is σ = 30276180. Its totient is φ = 29969968.

The previous prime is 30123061. The next prime is 30123089. The reversal of 30123073 is 37032103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37032103 = 17 ⋅2178359.

It can be written as a sum of positive squares in 2 ways, for example, as 13082689 + 17040384 = 3617^2 + 4128^2 .

It is a cyclic number.

It is not a de Polignac number, because 30123073 - 2¹³ = 30114881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30123073.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76258 + ... + 76651.

It is an arithmetic number, because the mean of its divisors is an integer number (7569045).

Almost surely, 2^30123073 is an apocalyptic number.

It is an amenable number.

30123073 is a deficient number, since it is larger than the sum of its proper divisors (153107).

30123073 is a wasteful number, since it uses less digits than its factorization.

30123073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153106.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 30123073 is about 5488.4490523280. The cubic root of 30123073 is about 311.1475780052.

Adding to 30123073 its reverse (37032103), we get a palindrome (67155176).

The spelling of 30123073 in words is "thirty million, one hundred twenty-three thousand, seventy-three".