613161 has 12 divisors (see below), whose sum is σ = 892788. Its totient is φ = 405504.

The previous prime is 613153. The next prime is 613163. The reversal of 613161 is 161316.

613161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 197136 + 416025 = 444^2 + 645^2 .

It is not a de Polignac number, because 613161 - 2³ = 613153 is a prime.

It is an Ulam number.

613161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (613163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1561 + ... + 1913.

It is an arithmetic number, because the mean of its divisors is an integer number (74399).

2⁶¹³¹⁶¹ is an apocalyptic number.

It is an amenable number.

613161 is a deficient number, since it is larger than the sum of its proper divisors (279627).

613161 is a wasteful number, since it uses less digits than its factorization.

613161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 549 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 613161 is about 783.0459756617. The cubic root of 613161 is about 84.9555015067.

Adding to 613161 its reverse (161316), we get a palindrome (774477).

The spelling of 613161 in words is "six hundred thirteen thousand, one hundred sixty-one".