187189045 has 16 divisors (see below), whose sum is σ = 236787840. Its totient is φ = 141666624.

The previous prime is 187189043. The next prime is 187189049. The reversal of 187189045 is 540981781.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 187189045 - 2¹ = 187189043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 187188992 and 187189010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187189043) 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 15 ways as a sum of consecutive naturals, for example, 120544 + ... + 122086.

It is an arithmetic number, because the mean of its divisors is an integer number (14799240).

Almost surely, 2^187189045 is an apocalyptic number.

It is an amenable number.

187189045 is a deficient number, since it is larger than the sum of its proper divisors (49598795).

187189045 is a wasteful number, since it uses less digits than its factorization.

187189045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 187189045 is about 13681.7047548907. The cubic root of 187189045 is about 572.0405421001.

The spelling of 187189045 in words is "one hundred eighty-seven million, one hundred eighty-nine thousand, forty-five".