188989969 has 16 divisors (see below), whose sum is σ = 234880128. Its totient is φ = 148338432.

The previous prime is 188989963. The next prime is 188989973. The reversal of 188989969 is 969989881.

It is a cyclic number.

It is not a de Polignac number, because 188989969 - 2¹¹ = 188987921 is a prime.

It is a super-2 number, since 2×188989969² = 71434416765241922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (188989963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17059 + ... + 25864.

It is an arithmetic number, because the mean of its divisors is an integer number (14680008).

Almost surely, 2^188989969 is an apocalyptic number.

It is an amenable number.

188989969 is a deficient number, since it is larger than the sum of its proper divisors (45890159).

188989969 is a wasteful number, since it uses less digits than its factorization.

188989969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42984.

The product of its digits is 20155392, while the sum is 67.

The square root of 188989969 is about 13747.3622560839. The cubic root of 188989969 is about 573.8692019470.

The spelling of 188989969 in words is "one hundred eighty-eight million, nine hundred eighty-nine thousand, nine hundred sixty-nine".