189850897 has 4 divisors (see below), whose sum is σ = 189956416. Its totient is φ = 189745380.

The previous prime is 189850889. The next prime is 189850933. The reversal of 189850897 is 798058981.

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 189850897 - 2³ = 189850889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189850807) 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, 50013 + ... + 53674.

It is an arithmetic number, because the mean of its divisors is an integer number (47489104).

Almost surely, 2^189850897 is an apocalyptic number.

It is an amenable number.

189850897 is a deficient number, since it is larger than the sum of its proper divisors (105519).

189850897 is a wasteful number, since it uses less digits than its factorization.

189850897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105518.

The product of its (nonzero) digits is 1451520, while the sum is 55.

The square root of 189850897 is about 13778.6391563173. The cubic root of 189850897 is about 574.7392864694.

The spelling of 189850897 in words is "one hundred eighty-nine million, eight hundred fifty thousand, eight hundred ninety-seven".