188789149 has 4 divisors (see below), whose sum is σ = 198725440. Its totient is φ = 178852860.

The previous prime is 188789143. The next prime is 188789189. The reversal of 188789149 is 941987881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 188789149 - 2¹⁷ = 188658077 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 188789149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188789143) 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, 4968117 + ... + 4968154.

It is an arithmetic number, because the mean of its divisors is an integer number (49681360).

Almost surely, 2^188789149 is an apocalyptic number.

188789149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

188789149 is a deficient number, since it is larger than the sum of its proper divisors (9936291).

188789149 is an equidigital number, since it uses as much as digits as its factorization.

188789149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9936290.

The product of its digits is 1161216, while the sum is 55.

The square root of 188789149 is about 13740.0563681522. The cubic root of 188789149 is about 573.6658661874.

The spelling of 188789149 in words is "one hundred eighty-eight million, seven hundred eighty-nine thousand, one hundred forty-nine".