30173149 has 4 divisors (see below), whose sum is σ = 30188380. Its totient is φ = 30157920.

The previous prime is 30173141. The next prime is 30173183. The reversal of 30173149 is 94137103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94137103 = 29 ⋅3246107.

It can be written as a sum of positive squares in 2 ways, for example, as 19740249 + 10432900 = 4443^2 + 3230^2 .

It is a cyclic number.

It is not a de Polignac number, because 30173149 - 2³ = 30173141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30173141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4104 + ... + 8785.

It is an arithmetic number, because the mean of its divisors is an integer number (7547095).

Almost surely, 2^30173149 is an apocalyptic number.

It is an amenable number.

30173149 is a deficient number, since it is larger than the sum of its proper divisors (15231).

30173149 is a wasteful number, since it uses less digits than its factorization.

30173149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15230.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 30173149 is about 5493.0091024865. The cubic root of 30173149 is about 311.3198977441.

The spelling of 30173149 in words is "thirty million, one hundred seventy-three thousand, one hundred forty-nine".