365789 has 4 divisors (see below), whose sum is σ = 387324. Its totient is φ = 344256.

The previous prime is 365779. The next prime is 365791. The reversal of 365789 is 987563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987563 = 19 ⋅51977.

It can be written as a sum of positive squares in 2 ways, for example, as 209764 + 156025 = 458^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 365789 - 2⁴ = 365773 is a prime.

It is a Duffinian 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 365789.

It is not an unprimeable number, because it can be changed into a prime (365749) 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 3 ways as a sum of consecutive naturals, for example, 10742 + ... + 10775.

It is an arithmetic number, because the mean of its divisors is an integer number (96831).

2³⁶⁵⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

365789 is a deficient number, since it is larger than the sum of its proper divisors (21535).

365789 is a wasteful number, since it uses less digits than its factorization.

365789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21534.

The product of its digits is 45360, while the sum is 38.

The square root of 365789 is about 604.8049272286. The cubic root of 365789 is about 71.5171523881.

The spelling of 365789 in words is "three hundred sixty-five thousand, seven hundred eighty-nine".