189420169 has 3 divisors (see below), whose sum is σ = 189433933. Its totient is φ = 189406406.

The previous prime is 189420163. The next prime is 189420229. The reversal of 189420169 is 961024981.

The square root of 189420169 is 13763.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 189420169 - 2¹¹ = 189418121 is a prime.

It is a super-2 number, since 2×189420169² = 71760000847977122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189420163) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6882 + ... + 20644.

Almost surely, 2^189420169 is an apocalyptic number.

189420169 is the 13763-rd square number.

189420169 is the 6882-nd centered octagonal number.

It is an amenable number.

189420169 is a deficient number, since it is larger than the sum of its proper divisors (13764).

189420169 is an frugal number, since it uses more digits than its factorization.

189420169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27526 (or 13763 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The cubic root of 189420169 is about 574.3043069500.

The spelling of 189420169 in words is "one hundred eighty-nine million, four hundred twenty thousand, one hundred sixty-nine".