189589685 has 4 divisors (see below), whose sum is σ = 227507628. Its totient is φ = 151671744.

The previous prime is 189589633. The next prime is 189589691. The reversal of 189589685 is 586985981.

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 21031396 + 168558289 = 4586^2 + 12983^2 .

It is a cyclic number.

It is not a de Polignac number, because 189589685 - 2²² = 185395381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18958964 + ... + 18958973.

It is an arithmetic number, because the mean of its divisors is an integer number (56876907).

Almost surely, 2^189589685 is an apocalyptic number.

It is an amenable number.

189589685 is a deficient number, since it is larger than the sum of its proper divisors (37917943).

189589685 is an equidigital number, since it uses as much as digits as its factorization.

189589685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37917942.

The product of its digits is 6220800, while the sum is 59.

The square root of 189589685 is about 13769.1570184961. The cubic root of 189589685 is about 574.4755747767.

It can be divided in two parts, 1895896 and 85, that added together give a palindrome (1895981).

The spelling of 189589685 in words is "one hundred eighty-nine million, five hundred eighty-nine thousand, six hundred eighty-five".