918395505197 has 2 divisors, whose sum is σ = 918395505198. Its totient is φ = 918395505196.

The previous prime is 918395505077. The next prime is 918395505259. The reversal of 918395505197 is 791505593819.

918395505197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (918395505259) can be obtained adding 918395505197 to its sum of digits (62).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 712616235556 + 205779269641 = 844166^2 + 453629^2 .

It is a cyclic number.

It is not a de Polignac number, because 918395505197 - 2¹⁸ = 918395243053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918395585197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459197752598 + 459197752599.

It is an arithmetic number, because the mean of its divisors is an integer number (459197752599).

Almost surely, 2^918395505197 is an apocalyptic number.

It is an amenable number.

918395505197 is a deficient number, since it is larger than the sum of its proper divisors (1).

918395505197 is an equidigital number, since it uses as much as digits as its factorization.

918395505197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309000, while the sum is 62.

The spelling of 918395505197 in words is "nine hundred eighteen billion, three hundred ninety-five million, five hundred five thousand, one hundred ninety-seven".