189557 has 4 divisors (see below), whose sum is σ = 191136. Its totient is φ = 187980.

The previous prime is 189547. The next prime is 189559. The reversal of 189557 is 755981.

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: 755981 = 193 ⋅3917.

It is a cyclic number.

It is not a de Polignac number, because 189557 - 2⁶ = 189493 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 (189559) 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, 593 + ... + 854.

It is an arithmetic number, because the mean of its divisors is an integer number (47784).

2¹⁸⁹⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

189557 is a deficient number, since it is larger than the sum of its proper divisors (1579).

189557 is a wasteful number, since it uses less digits than its factorization.

189557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578.

The product of its digits is 12600, while the sum is 35.

The square root of 189557 is about 435.3814419564. The cubic root of 189557 is about 57.4442559947. Note that the first 3 decimals are identical.

The spelling of 189557 in words is "one hundred eighty-nine thousand, five hundred fifty-seven".