189397 has 8 divisors (see below), whose sum is σ = 216216. Its totient is φ = 164352.

The previous prime is 189391. The next prime is 189401. The reversal of 189397 is 793981.

It can be written as a sum of positive squares in 4 ways, for example, as 60516 + 128881 = 246^2 + 359^2 .

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 189397 - 2³ = 189389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208 + ... + 649.

It is an arithmetic number, because the mean of its divisors is an integer number (27027).

2¹⁸⁹³⁹⁷ is an apocalyptic number.

189397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

189397 is a deficient number, since it is larger than the sum of its proper divisors (26819).

189397 is a wasteful number, since it uses less digits than its factorization.

189397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887.

The product of its digits is 13608, while the sum is 37.

The square root of 189397 is about 435.1976562437. The cubic root of 189397 is about 57.4280890579.

It can be divided in two parts, 1 and 89397, that added together give a palindrome (89398).

The spelling of 189397 in words is "one hundred eighty-nine thousand, three hundred ninety-seven".