617161 has 2 divisors, whose sum is σ = 617162. Its totient is φ = 617160.

The previous prime is 617153. The next prime is 617189. The reversal of 617161 is 161716.

617161 = 555² + 556².

617161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309136 + 308025 = 556^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 617161 - 2³ = 617153 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308580 + 308581.

It is an arithmetic number, because the mean of its divisors is an integer number (308581).

2⁶¹⁷¹⁶¹ is an apocalyptic number.

617161 is the 556-th centered square number.

It is an amenable number.

617161 is a deficient number, since it is larger than the sum of its proper divisors (1).

617161 is an equidigital number, since it uses as much as digits as its factorization.

617161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 22.

The square root of 617161 is about 785.5959521281. The cubic root of 617161 is about 85.1398390197.

Adding to 617161 its reverse (161716), we get a palindrome (778877).

The spelling of 617161 in words is "six hundred seventeen thousand, one hundred sixty-one".