189769 has 4 divisors (see below), whose sum is σ = 191620. Its totient is φ = 187920.

The previous prime is 189767. The next prime is 189797. The reversal of 189769 is 967981.

189769 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 an emirpimes, since its reverse is a distinct semiprime: 967981 = 7 ⋅138283.

It can be written as a sum of positive squares in 2 ways, for example, as 45369 + 144400 = 213^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 189769 - 2¹ = 189767 is a prime.

It is a super-2 number, since 2×189769² = 72024546722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189767) 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, 762 + ... + 979.

It is an arithmetic number, because the mean of its divisors is an integer number (47905).

2¹⁸⁹⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

189769 is a deficient number, since it is larger than the sum of its proper divisors (1851).

189769 is a wasteful number, since it uses less digits than its factorization.

189769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850.

The product of its digits is 27216, while the sum is 40.

The square root of 189769 is about 435.6248385939. The cubic root of 189769 is about 57.4656631793.

The spelling of 189769 in words is "one hundred eighty-nine thousand, seven hundred sixty-nine".