889523209 has 4 divisors (see below), whose sum is σ = 936340240. Its totient is φ = 842706180.

The previous prime is 889523189. The next prime is 889523213. The reversal of 889523209 is 902325988.

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.

It is a cyclic number.

It is not a de Polignac number, because 889523209 - 2¹³ = 889515017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (889583209) 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, 23408487 + ... + 23408524.

It is an arithmetic number, because the mean of its divisors is an integer number (234085060).

Almost surely, 2^889523209 is an apocalyptic number.

It is an amenable number.

889523209 is a deficient number, since it is larger than the sum of its proper divisors (46817031).

889523209 is a wasteful number, since it uses less digits than its factorization.

889523209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46817030.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 889523209 is about 29824.8756745104. The cubic root of 889523209 is about 961.7283711330.

The spelling of 889523209 in words is "eight hundred eighty-nine million, five hundred twenty-three thousand, two hundred nine".