618684361 has 2 divisors, whose sum is σ = 618684362. Its totient is φ = 618684360.

The previous prime is 618684307. The next prime is 618684371. The reversal of 618684361 is 163486816.

It is a happy number.

618684361 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., 407272761 + 211411600 = 20181^2 + 14540^2 .

It is a cyclic number.

It is not a de Polignac number, because 618684361 - 2¹⁷ = 618553289 is a prime.

It is not a weakly prime, because it can be changed into another prime (618684371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309342180 + 309342181.

It is an arithmetic number, because the mean of its divisors is an integer number (309342181).

Almost surely, 2^618684361 is an apocalyptic number.

It is an amenable number.

618684361 is a deficient number, since it is larger than the sum of its proper divisors (1).

618684361 is an equidigital number, since it uses as much as digits as its factorization.

618684361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The square root of 618684361 is about 24873.3664991291. The cubic root of 618684361 is about 852.0983271833.

The spelling of 618684361 in words is "six hundred eighteen million, six hundred eighty-four thousand, three hundred sixty-one".