61489 has 4 divisors (see below), whose sum is σ = 65124. Its totient is φ = 57856.

The previous prime is 61487. The next prime is 61493. The reversal of 61489 is 98416.

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 18225 + 43264 = 135^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 61489 - 2¹ = 61487 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (61483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792 + ... + 1825.

It is an arithmetic number, because the mean of its divisors is an integer number (16281).

2⁶¹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

61489 is a deficient number, since it is larger than the sum of its proper divisors (3635).

61489 is a wasteful number, since it uses less digits than its factorization.

61489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634.

The product of its digits is 1728, while the sum is 28.

The square root of 61489 is about 247.9697562204. The cubic root of 61489 is about 39.4698803664.

It can be divided in two parts, 614 and 89, that added together give a triangular number (703 = T₃₇).

The spelling of 61489 in words is "sixty-one thousand, four hundred eighty-nine".