189885697 has 4 divisors (see below), whose sum is σ = 193468500. Its totient is φ = 186302896.

The previous prime is 189885673. The next prime is 189885713. The reversal of 189885697 is 796588981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156350016 + 33535681 = 12504^2 + 5791^2 .

It is a cyclic number.

It is not a de Polignac number, because 189885697 - 2⁷ = 189885569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189885607) 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, 1791322 + ... + 1791427.

It is an arithmetic number, because the mean of its divisors is an integer number (48367125).

Almost surely, 2^189885697 is an apocalyptic number.

It is an amenable number.

189885697 is a deficient number, since it is larger than the sum of its proper divisors (3582803).

189885697 is an equidigital number, since it uses as much as digits as its factorization.

189885697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3582802.

The product of its digits is 8709120, while the sum is 61.

The square root of 189885697 is about 13779.9019227279. The cubic root of 189885697 is about 574.7744012279.

The spelling of 189885697 in words is "one hundred eighty-nine million, eight hundred eighty-five thousand, six hundred ninety-seven".