189957 has 8 divisors (see below), whose sum is σ = 264384. Its totient is φ = 121088.

The previous prime is 189949. The next prime is 189961. The reversal of 189957 is 759981.

It is a happy number.

189957 is nontrivially palindromic in base 12.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189957 - 2³ = 189949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1308 + ... + 1445.

It is an arithmetic number, because the mean of its divisors is an integer number (33048).

2¹⁸⁹⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

189957 is a deficient number, since it is larger than the sum of its proper divisors (74427).

189957 is a wasteful number, since it uses less digits than its factorization.

189957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779.

The product of its digits is 22680, while the sum is 39.

The square root of 189957 is about 435.8405671802. The cubic root of 189957 is about 57.4846335750.

The spelling of 189957 in words is "one hundred eighty-nine thousand, nine hundred fifty-seven".