187923117001 has 3 divisors (see below), whose sum is σ = 187923550503. Its totient is φ = 187922683500.

The previous prime is 187923116999. The next prime is 187923117047. The reversal of 187923117001 is 100711329781.

The square root of 187923117001 is 433501.

It is a perfect power (a square), and thus also a powerful number.

187923117001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 100711329781 = 313 ⋅321761437.

It can be written as a sum of positive squares in only one way, i.e., 139090956601 + 48832160400 = 372949^2 + 220980^2 .

It is not a de Polignac number, because 187923117001 - 2¹ = 187923116999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (187923717001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 216751 + ... + 650251.

It is an arithmetic number, because the mean of its divisors is an integer number (62641183501).

Almost surely, 2^187923117001 is an apocalyptic number.

187923117001 is the 433501-st square number.

187923117001 is the 216751-st centered octagonal number.

It is an amenable number.

187923117001 is a deficient number, since it is larger than the sum of its proper divisors (433502).

187923117001 is an frugal number, since it uses more digits than its factorization.

187923117001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867002 (or 433501 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 40.

The spelling of 187923117001 in words is "one hundred eighty-seven billion, nine hundred twenty-three million, one hundred seventeen thousand, one".