189150987 has 8 divisors (see below), whose sum is σ = 252265104. Its totient is φ = 126068768.

The previous prime is 189150979. The next prime is 189151007. The reversal of 189150987 is 789051981.

189150987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189150987 - 2³ = 189150979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189150967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17413 + ... + 26105.

It is an arithmetic number, because the mean of its divisors is an integer number (31533138).

Almost surely, 2^189150987 is an apocalyptic number.

189150987 is a deficient number, since it is larger than the sum of its proper divisors (63114117).

189150987 is an equidigital number, since it uses as much as digits as its factorization.

189150987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15949.

The product of its (nonzero) digits is 181440, while the sum is 48.

The square root of 189150987 is about 13753.2173326826. The cubic root of 189150987 is about 574.0321330658.

The spelling of 189150987 in words is "one hundred eighty-nine million, one hundred fifty thousand, nine hundred eighty-seven".