187794081 has 12 divisors (see below), whose sum is σ = 285535120. Its totient is φ = 118606680.

The previous prime is 187794073. The next prime is 187794097. The reversal of 187794081 is 180497781.

It is not a de Polignac number, because 187794081 - 2³ = 187794073 is a prime.

It is a super-2 number, since 2×187794081² = 70533233717269122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (187794031) 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 11 ways as a sum of consecutive naturals, for example, 548935 + ... + 549276.

Almost surely, 2^187794081 is an apocalyptic number.

It is an amenable number.

187794081 is a deficient number, since it is larger than the sum of its proper divisors (97741039).

187794081 is a wasteful number, since it uses less digits than its factorization.

187794081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098236 (or 1098233 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The square root of 187794081 is about 13703.7980501757. The cubic root of 187794081 is about 572.6561993780.

The spelling of 187794081 in words is "one hundred eighty-seven million, seven hundred ninety-four thousand, eighty-one".