30397189 has 4 divisors (see below), whose sum is σ = 30515724. Its totient is φ = 30278656.

The previous prime is 30397187. The next prime is 30397201. The reversal of 30397189 is 98179303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98179303 = 241 ⋅407383.

It can be written as a sum of positive squares in 2 ways, for example, as 19228225 + 11168964 = 4385^2 + 3342^2 .

It is a cyclic number.

It is not a de Polignac number, because 30397189 - 2¹ = 30397187 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30397187) 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, 58882 + ... + 59395.

It is an arithmetic number, because the mean of its divisors is an integer number (7628931).

Almost surely, 2^30397189 is an apocalyptic number.

It is an amenable number.

30397189 is a deficient number, since it is larger than the sum of its proper divisors (118535).

30397189 is a wasteful number, since it uses less digits than its factorization.

30397189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118534.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 30397189 is about 5513.3645807256. The cubic root of 30397189 is about 312.0885302409.

The spelling of 30397189 in words is "thirty million, three hundred ninety-seven thousand, one hundred eighty-nine".