187989172 has 12 divisors (see below), whose sum is σ = 375978400. Its totient is φ = 80566776.

The previous prime is 187989169. The next prime is 187989181. The reversal of 187989172 is 271989781.

187989172 is an admirable number.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3356922 + ... + 3356977.

Almost surely, 2^187989172 is an apocalyptic number.

It is an amenable number.

187989172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

187989172 is a wasteful number, since it uses less digits than its factorization.

187989172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6713910 (or 6713908 counting only the distinct ones).

The product of its digits is 508032, while the sum is 52.

The square root of 187989172 is about 13710.9143385844. The cubic root of 187989172 is about 572.8544331834.

The spelling of 187989172 in words is "one hundred eighty-seven million, nine hundred eighty-nine thousand, one hundred seventy-two".