30188149 has 4 divisors (see below), whose sum is σ = 30201100. Its totient is φ = 30175200.

The previous prime is 30188143. The next prime is 30188173. The reversal of 30188149 is 94188103.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 17098225 + 13089924 = 4135^2 + 3618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30188149 is a prime.

It is a super-2 number, since 2×30188149² = 1822648680092402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30188143) 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, 1902 + ... + 7999.

It is an arithmetic number, because the mean of its divisors is an integer number (7550275).

Almost surely, 2^30188149 is an apocalyptic number.

It is an amenable number.

30188149 is a deficient number, since it is larger than the sum of its proper divisors (12951).

30188149 is an equidigital number, since it uses as much as digits as its factorization.

30188149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12950.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 30188149 is about 5494.3743046866. The cubic root of 30188149 is about 311.3714780950.

The spelling of 30188149 in words is "thirty million, one hundred eighty-eight thousand, one hundred forty-nine".