30187147 has 2 divisors, whose sum is σ = 30187148. Its totient is φ = 30187146.

The previous prime is 30187133. The next prime is 30187151. The reversal of 30187147 is 74178103.

It is a strong prime.

It is an emirp because it is prime and its reverse (74178103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30187147 - 2¹⁹ = 29662859 is a prime.

It is a super-2 number, since 2×30187147² = 1822527687999218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30187117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15093573 + 15093574.

It is an arithmetic number, because the mean of its divisors is an integer number (15093574).

Almost surely, 2^30187147 is an apocalyptic number.

30187147 is a deficient number, since it is larger than the sum of its proper divisors (1).

30187147 is an equidigital number, since it uses as much as digits as its factorization.

30187147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 30187147 is about 5494.2831197527. The cubic root of 30187147 is about 311.3680330602.

The spelling of 30187147 in words is "thirty million, one hundred eighty-seven thousand, one hundred forty-seven".