64389 has 12 divisors (see below), whose sum is σ = 93696. Its totient is φ = 39312.

The previous prime is 64381. The next prime is 64399. The reversal of 64389 is 98346.

Added to its reverse (98346) it gives a triangular number (162735 = T₅₇₀).

It is not a de Polignac number, because 64389 - 2³ = 64381 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444 + ... + 570.

It is an arithmetic number, because the mean of its divisors is an integer number (7808).

2⁶⁴³⁸⁹ is an apocalyptic number.

It is an amenable number.

64389 is a deficient number, since it is larger than the sum of its proper divisors (29307).

64389 is a wasteful number, since it uses less digits than its factorization.

64389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 143 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 64389 is about 253.7498768473. The cubic root of 64389 is about 40.0808780251.

Adding to 64389 its reverse (98346), we get a triangular number (162735 = T₅₇₀).

The spelling of 64389 in words is "sixty-four thousand, three hundred eighty-nine".