61717 has 2 divisors, whose sum is σ = 61718. Its totient is φ = 61716.

The previous prime is 61703. The next prime is 61723. The reversal of 61717 is 71716.

61717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40401 + 21316 = 201^2 + 146^2 .

It is a cyclic number.

It is not a de Polignac number, because 61717 - 2¹¹ = 59669 is a 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 (61757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30858 + 30859.

It is an arithmetic number, because the mean of its divisors is an integer number (30859).

2⁶¹⁷¹⁷ is an apocalyptic number.

It is an amenable number.

61717 is a deficient number, since it is larger than the sum of its proper divisors (1).

61717 is an equidigital number, since it uses as much as digits as its factorization.

61717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294, while the sum is 22.

The square root of 61717 is about 248.4290643222. The cubic root of 61717 is about 39.5186047058.

Subtracting 61717 from its reverse (71716), we obtain a palindrome (9999).

The spelling of 61717 in words is "sixty-one thousand, seven hundred seventeen".