189688637 has 8 divisors (see below), whose sum is σ = 193622400. Its totient is φ = 185795104.

The previous prime is 189688633. The next prime is 189688651. The reversal of 189688637 is 736886981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189688637 - 2² = 189688633 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189688633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437 + ... + 19482.

It is an arithmetic number, because the mean of its divisors is an integer number (24202800).

Almost surely, 2^189688637 is an apocalyptic number.

It is an amenable number.

189688637 is a deficient number, since it is larger than the sum of its proper divisors (3933763).

189688637 is a wasteful number, since it uses less digits than its factorization.

189688637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20115.

The product of its digits is 3483648, while the sum is 56.

The square root of 189688637 is about 13772.7497980614. The cubic root of 189688637 is about 574.5755021896.

The spelling of 189688637 in words is "one hundred eighty-nine million, six hundred eighty-eight thousand, six hundred thirty-seven".