618361 has 2 divisors, whose sum is σ = 618362. Its totient is φ = 618360.

The previous prime is 618349. The next prime is 618377. The reversal of 618361 is 163816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 336400 + 281961 = 580^2 + 531^2 .

It is a cyclic number.

It is not a de Polignac number, because 618361 - 2⁵ = 618329 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (618301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309180 + 309181.

It is an arithmetic number, because the mean of its divisors is an integer number (309181).

2⁶¹⁸³⁶¹ is an apocalyptic number.

It is an amenable number.

618361 is a deficient number, since it is larger than the sum of its proper divisors (1).

618361 is an equidigital number, since it uses as much as digits as its factorization.

618361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 618361 is about 786.3593326209. The cubic root of 618361 is about 85.1949849003.

It can be divided in two parts, 618 and 361, that added together give a palindrome (979).

The spelling of 618361 in words is "six hundred eighteen thousand, three hundred sixty-one".