393189 has 4 divisors (see below), whose sum is σ = 524256. Its totient is φ = 262124.

The previous prime is 393187. The next prime is 393191. The reversal of 393189 is 981393.

393189 = 205² + 206² + ... + 213².

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 an interprime number because it is at equal distance from previous prime (393187) and next prime (393191).

It is a cyclic number.

It is not a de Polignac number, because 393189 - 2¹ = 393187 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 393189.

It is not an unprimeable number, because it can be changed into a prime (393181) 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, 65529 + ... + 65534.

It is an arithmetic number, because the mean of its divisors is an integer number (131064).

393189 is a Friedman number, since it can be written as ((3-1)^(9+8)-9)*3, using all its digits and the basic arithmetic operations.

2³⁹³¹⁸⁹ is an apocalyptic number.

It is an amenable number.

393189 is a deficient number, since it is larger than the sum of its proper divisors (131067).

393189 is a wasteful number, since it uses less digits than its factorization.

393189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131066.

The product of its digits is 5832, while the sum is 33.

The square root of 393189 is about 627.0478450645. The cubic root of 393189 is about 73.2600346575.

The spelling of 393189 in words is "three hundred ninety-three thousand, one hundred eighty-nine".