187984061 has 4 divisors (see below), whose sum is σ = 194466300. Its totient is φ = 181501824.

The previous prime is 187984033. The next prime is 187984063. The reversal of 187984061 is 160489781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 158281561 + 29702500 = 12581^2 + 5450^2 .

It is a cyclic number.

It is not a de Polignac number, because 187984061 - 2¹⁴ = 187967677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187984063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3241076 + ... + 3241133.

It is an arithmetic number, because the mean of its divisors is an integer number (48616575).

Almost surely, 2^187984061 is an apocalyptic number.

It is an amenable number.

187984061 is a deficient number, since it is larger than the sum of its proper divisors (6482239).

187984061 is an equidigital number, since it uses as much as digits as its factorization.

187984061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6482238.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 187984061 is about 13710.7279529571. The cubic root of 187984061 is about 572.8492415979.

The spelling of 187984061 in words is "one hundred eighty-seven million, nine hundred eighty-four thousand, sixty-one".