61117 has 4 divisors (see below), whose sum is σ = 69856. Its totient is φ = 52380.

The previous prime is 61099. The next prime is 61121. The reversal of 61117 is 71116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61117 - 2¹¹ = 59069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4359 + ... + 4372.

It is an arithmetic number, because the mean of its divisors is an integer number (17464).

2⁶¹¹¹⁷ is an apocalyptic number.

It is an amenable number.

61117 is a deficient number, since it is larger than the sum of its proper divisors (8739).

61117 is an equidigital number, since it uses as much as digits as its factorization.

61117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8738.

The product of its digits is 42, while the sum is 16.

The square root of 61117 is about 247.2185268138. The cubic root of 61117 is about 39.3901235262.

Subtracting from 61117 its product of digits (42), we obtain a triangular number (61075 = T₃₄₉).

Subtracting 61117 from its reverse (71116), we obtain a palindrome (9999).

The spelling of 61117 in words is "sixty-one thousand, one hundred seventeen".