189969669 has 12 divisors (see below), whose sum is σ = 276919500. Its totient is φ = 125483904.

The previous prime is 189969623. The next prime is 189969697. The reversal of 189969669 is 966969981.

It can be written as a sum of positive squares in 2 ways, for example, as 172580769 + 17388900 = 13137^2 + 4170^2 .

It is not a de Polignac number, because 189969669 - 2¹¹ = 189967621 is a prime.

It is a super-2 number, since 2×189969669² = 72176950279939122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189969569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95844 + ... + 97805.

It is an arithmetic number, because the mean of its divisors is an integer number (23076625).

Almost surely, 2^189969669 is an apocalyptic number.

It is an amenable number.

189969669 is a deficient number, since it is larger than the sum of its proper divisors (86949831).

189969669 is a wasteful number, since it uses less digits than its factorization.

189969669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193764 (or 193761 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 63.

The square root of 189969669 is about 13782.9484871707. The cubic root of 189969669 is about 574.8591150740.

The spelling of 189969669 in words is "one hundred eighty-nine million, nine hundred sixty-nine thousand, six hundred sixty-nine".