187930093 has 4 divisors (see below), whose sum is σ = 202386268. Its totient is φ = 173473920.

The previous prime is 187930051. The next prime is 187930097. The reversal of 187930093 is 390039781.

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 51811204 + 136118889 = 7198^2 + 11667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187930093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187930097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7228068 + ... + 7228093.

It is an arithmetic number, because the mean of its divisors is an integer number (50596567).

Almost surely, 2^187930093 is an apocalyptic number.

187930093 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

187930093 is a deficient number, since it is larger than the sum of its proper divisors (14456175).

187930093 is a wasteful number, since it uses less digits than its factorization.

187930093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14456174.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 187930093 is about 13708.7597177863. The cubic root of 187930093 is about 572.7944169377.

The spelling of 187930093 in words is "one hundred eighty-seven million, nine hundred thirty thousand, ninety-three".