189868585 has 8 divisors (see below), whose sum is σ = 227916936. Its totient is φ = 151845120.

The previous prime is 189868573. The next prime is 189868619. The reversal of 189868585 is 585868981.

It can be written as a sum of positive squares in 4 ways, for example, as 62900761 + 126967824 = 7931^2 + 11268^2 .

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

It is not a de Polignac number, because 189868585 - 2¹³ = 189860393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23377 + ... + 30433.

It is an arithmetic number, because the mean of its divisors is an integer number (28489617).

Almost surely, 2^189868585 is an apocalyptic number.

It is an amenable number.

189868585 is a deficient number, since it is larger than the sum of its proper divisors (38048351).

189868585 is an equidigital number, since it uses as much as digits as its factorization.

189868585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12443.

The product of its digits is 5529600, while the sum is 58.

The square root of 189868585 is about 13779.2810044646. The cubic root of 189868585 is about 574.7571349897.

The spelling of 189868585 in words is "one hundred eighty-nine million, eight hundred sixty-eight thousand, five hundred eighty-five".