89439 has 8 divisors (see below), whose sum is σ = 136320. Its totient is φ = 51096.

The previous prime is 89431. The next prime is 89443. The reversal of 89439 is 93498.

89439 = 2² + 3² + ... + 64².

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

It is not a de Polignac number, because 89439 - 2³ = 89431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89431) 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, 2109 + ... + 2150.

It is an arithmetic number, because the mean of its divisors is an integer number (17040).

2⁸⁹⁴³⁹ is an apocalyptic number.

89439 is a deficient number, since it is larger than the sum of its proper divisors (46881).

89439 is a wasteful number, since it uses less digits than its factorization.

89439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269.

The product of its digits is 7776, while the sum is 33.

The square root of 89439 is about 299.0635383995. The cubic root of 89439 is about 44.7207396914.

It can be divided in two parts, 89 and 439, that added together give a triangular number (528 = T₃₂).

The spelling of 89439 in words is "eighty-nine thousand, four hundred thirty-nine".