236389 has 4 divisors (see below), whose sum is σ = 238924. Its totient is φ = 233856.

The previous prime is 236387. The next prime is 236399. The reversal of 236389 is 983632.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173889 + 62500 = 417^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 236389 - 2¹ = 236387 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 236389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (236381) 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, 1122 + ... + 1315.

It is an arithmetic number, because the mean of its divisors is an integer number (59731).

2²³⁶³⁸⁹ is an apocalyptic number.

It is an amenable number.

236389 is a deficient number, since it is larger than the sum of its proper divisors (2535).

236389 is an equidigital number, since it uses as much as digits as its factorization.

236389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534.

The product of its digits is 7776, while the sum is 31.

The square root of 236389 is about 486.1985191257. The cubic root of 236389 is about 61.8314011129.

It can be divided in two parts, 236 and 389, that added together give a 4-th power (625 = 5⁴).

The spelling of 236389 in words is "two hundred thirty-six thousand, three hundred eighty-nine".