61389 has 12 divisors (see below), whose sum is σ = 93600. Its totient is φ = 38664.

The previous prime is 61381. The next prime is 61403. The reversal of 61389 is 98316.

It is not a de Polignac number, because 61389 - 2³ = 61381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61381) 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, 9 + ... + 350.

It is an arithmetic number, because the mean of its divisors is an integer number (7800).

2⁶¹³⁸⁹ is an apocalyptic number.

It is an amenable number.

61389 is a deficient number, since it is larger than the sum of its proper divisors (32211).

61389 is a wasteful number, since it uses less digits than its factorization.

61389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 381 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 61389 is about 247.7680366795. The cubic root of 61389 is about 39.4484720406.

Adding to 61389 its sum of digits (27), we get a palindrome (61416).

The spelling of 61389 in words is "sixty-one thousand, three hundred eighty-nine".