187972103 has 4 divisors (see below), whose sum is σ = 205060488. Its totient is φ = 170883720.

The previous prime is 187972091. The next prime is 187972121. The reversal of 187972103 is 301279781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301279781 = 11 ⋅27389071.

It is a cyclic number.

It is not a de Polignac number, because 187972103 - 2¹⁰ = 187971079 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 (187972163) 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, 8544176 + ... + 8544197.

It is an arithmetic number, because the mean of its divisors is an integer number (51265122).

Almost surely, 2^187972103 is an apocalyptic number.

187972103 is a deficient number, since it is larger than the sum of its proper divisors (17088385).

187972103 is a wasteful number, since it uses less digits than its factorization.

187972103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17088384.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 187972103 is about 13710.2918641435. The cubic root of 187972103 is about 572.8370946878.

The spelling of 187972103 in words is "one hundred eighty-seven million, nine hundred seventy-two thousand, one hundred three".