618368197 has 2 divisors, whose sum is σ = 618368198. Its totient is φ = 618368196.

The previous prime is 618368159. The next prime is 618368239. The reversal of 618368197 is 791863816.

618368197 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., 592143556 + 26224641 = 24334^2 + 5121^2 .

It is a cyclic number.

It is not a de Polignac number, because 618368197 - 2¹¹ = 618366149 is a prime.

It is a super-2 number, since 2×618368197² = 764758454122061618, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 618368197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618368117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309184098 + 309184099.

It is an arithmetic number, because the mean of its divisors is an integer number (309184099).

Almost surely, 2^618368197 is an apocalyptic number.

It is an amenable number.

618368197 is a deficient number, since it is larger than the sum of its proper divisors (1).

618368197 is an equidigital number, since it uses as much as digits as its factorization.

618368197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 618368197 is about 24867.0102143382. The cubic root of 618368197 is about 851.9531542237.

The spelling of 618368197 in words is "six hundred eighteen million, three hundred sixty-eight thousand, one hundred ninety-seven".