189649669 has 4 divisors (see below), whose sum is σ = 206890560. Its totient is φ = 172408780.

The previous prime is 189649667. The next prime is 189649673. The reversal of 189649669 is 966946981.

189649669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 189649669 - 2¹ = 189649667 is a prime.

It is a super-2 number, since 2×189649669² = 71933993903619122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189649667) 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, 8620429 + ... + 8620450.

It is an arithmetic number, because the mean of its divisors is an integer number (51722640).

Almost surely, 2^189649669 is an apocalyptic number.

It is an amenable number.

189649669 is a deficient number, since it is larger than the sum of its proper divisors (17240891).

189649669 is a wasteful number, since it uses less digits than its factorization.

189649669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17240890.

The product of its digits is 5038848, while the sum is 58.

The square root of 189649669 is about 13771.3350478449. The cubic root of 189649669 is about 574.5361542140.

The spelling of 189649669 in words is "one hundred eighty-nine million, six hundred forty-nine thousand, six hundred sixty-nine".