187887161 has 32 divisors (see below), whose sum is σ = 245956608. Its totient is φ = 139170240.

The previous prime is 187887149. The next prime is 187887163. The reversal of 187887161 is 161788781.

It is a happy number.

It is not a de Polignac number, because 187887161 - 2⁶ = 187887097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (187887163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 490376 + ... + 490758.

It is an arithmetic number, because the mean of its divisors is an integer number (7686144).

Almost surely, 2^187887161 is an apocalyptic number.

187887161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

187887161 is a deficient number, since it is larger than the sum of its proper divisors (58069447).

187887161 is a wasteful number, since it uses less digits than its factorization.

187887161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701.

The product of its digits is 150528, while the sum is 47.

The square root of 187887161 is about 13707.1937682372. The cubic root of 187887161 is about 572.7507959608.

The spelling of 187887161 in words is "one hundred eighty-seven million, eight hundred eighty-seven thousand, one hundred sixty-one".