187995493 has 4 divisors (see below), whose sum is σ = 214852000. Its totient is φ = 161138988.

The previous prime is 187995449. The next prime is 187995529. The reversal of 187995493 is 394599781.

187995493 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 Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 394599781 = 29 ⋅13606889.

It is a cyclic number.

It is not a de Polignac number, because 187995493 - 2¹³ = 187987301 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 (187995403) 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, 13428243 + ... + 13428256.

It is an arithmetic number, because the mean of its divisors is an integer number (53713000).

Almost surely, 2^187995493 is an apocalyptic number.

It is an amenable number.

187995493 is a deficient number, since it is larger than the sum of its proper divisors (26856507).

187995493 is an equidigital number, since it uses as much as digits as its factorization.

187995493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26856506.

The product of its digits is 2449440, while the sum is 55.

The square root of 187995493 is about 13711.1448464379. The cubic root of 187995493 is about 572.8608537168.

The spelling of 187995493 in words is "one hundred eighty-seven million, nine hundred ninety-five thousand, four hundred ninety-three".