187894994 has 8 divisors (see below), whose sum is σ = 322105728. Its totient is φ = 80526420.

The previous prime is 187894979. The next prime is 187894997. The reversal of 187894994 is 499498781.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (187894997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6710522 + ... + 6710549.

It is an arithmetic number, because the mean of its divisors is an integer number (40263216).

Almost surely, 2^187894994 is an apocalyptic number.

187894994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

187894994 is a deficient number, since it is larger than the sum of its proper divisors (134210734).

187894994 is a wasteful number, since it uses less digits than its factorization.

187894994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13421080.

The product of its digits is 5225472, while the sum is 59.

The square root of 187894994 is about 13707.4794911391. The cubic root of 187894994 is about 572.7587551611.

The spelling of 187894994 in words is "one hundred eighty-seven million, eight hundred ninety-four thousand, nine hundred ninety-four".