61089 has 8 divisors (see below), whose sum is σ = 93120. Its totient is φ = 34896.

The previous prime is 61057. The next prime is 61091. The reversal of 61089 is 98016.

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

It is not a de Polignac number, because 61089 - 2⁵ = 61057 is a prime.

61089 is a lucky number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (61099) 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, 1434 + ... + 1475.

It is an arithmetic number, because the mean of its divisors is an integer number (11640).

2⁶¹⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

61089 is a deficient number, since it is larger than the sum of its proper divisors (32031).

61089 is a wasteful number, since it uses less digits than its factorization.

61089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2919.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 61089 is about 247.1618902663. The cubic root of 61089 is about 39.3841072408.

The spelling of 61089 in words is "sixty-one thousand, eighty-nine".