189850509 has 48 divisors (see below), whose sum is σ = 298771200. Its totient is φ = 115734528.

The previous prime is 189850481. The next prime is 189850511. The reversal of 189850509 is 905058981.

189850509 is a `hidden beast` number, since 1 + 8 + 98 + 50 + 509 = 666.

189850509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189850509 - 2²⁴ = 173073293 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189850009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1365762 + ... + 1365900.

It is an arithmetic number, because the mean of its divisors is an integer number (6224400).

Almost surely, 2^189850509 is an apocalyptic number.

It is an amenable number.

189850509 is a deficient number, since it is larger than the sum of its proper divisors (108920691).

189850509 is a wasteful number, since it uses less digits than its factorization.

189850509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 189850509 is about 13778.6250765452. The cubic root of 189850509 is about 574.7388949358.

The spelling of 189850509 in words is "one hundred eighty-nine million, eight hundred fifty thousand, five hundred nine".