189469661 has 4 divisors (see below), whose sum is σ = 191752512. Its totient is φ = 187186812.

The previous prime is 189469627. The next prime is 189469663. The reversal of 189469661 is 166964981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166964981 = 23 ⋅7259347.

It is a cyclic number.

It is not a de Polignac number, because 189469661 - 2¹⁰ = 189468637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189469663) 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, 1141301 + ... + 1141466.

It is an arithmetic number, because the mean of its divisors is an integer number (47938128).

Almost surely, 2^189469661 is an apocalyptic number.

It is an amenable number.

189469661 is a deficient number, since it is larger than the sum of its proper divisors (2282851).

189469661 is an equidigital number, since it uses as much as digits as its factorization.

189469661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2282850.

The product of its digits is 559872, while the sum is 50.

The square root of 189469661 is about 13764.7978917237. The cubic root of 189469661 is about 574.3543209722.

The spelling of 189469661 in words is "one hundred eighty-nine million, four hundred sixty-nine thousand, six hundred sixty-one".