61559 has 2 divisors, whose sum is σ = 61560. Its totient is φ = 61558.

The previous prime is 61553. The next prime is 61561. The reversal of 61559 is 95516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61559 - 2⁴ = 61543 is a prime.

Together with 61561, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30779 + 30780.

It is an arithmetic number, because the mean of its divisors is an integer number (30780).

2⁶¹⁵⁵⁹ is an apocalyptic number.

61559 is a deficient number, since it is larger than the sum of its proper divisors (1).

61559 is an equidigital number, since it uses as much as digits as its factorization.

61559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 26.

The square root of 61559 is about 248.1108623176. The cubic root of 61559 is about 39.4848523877.

The spelling of 61559 in words is "sixty-one thousand, five hundred fifty-nine".