187885081 has 8 divisors (see below), whose sum is σ = 190249280. Its totient is φ = 185531472.

The previous prime is 187885073. The next prime is 187885097. The reversal of 187885081 is 180588781.

187885081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 187885081 - 2³ = 187885073 is a prime.

It is a super-2 number, since 2×187885081² = 70601607324753122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (187885021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36631 + ... + 41443.

It is an arithmetic number, because the mean of its divisors is an integer number (23781160).

Almost surely, 2^187885081 is an apocalyptic number.

It is an amenable number.

187885081 is a deficient number, since it is larger than the sum of its proper divisors (2364199).

187885081 is a wasteful number, since it uses less digits than its factorization.

187885081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5295.

The product of its (nonzero) digits is 143360, while the sum is 46.

The square root of 187885081 is about 13707.1178954585. The cubic root of 187885081 is about 572.7486824120.

The spelling of 187885081 in words is "one hundred eighty-seven million, eight hundred eighty-five thousand, eighty-one".