9857355197 has 2 divisors, whose sum is σ = 9857355198. Its totient is φ = 9857355196.

The previous prime is 9857355187. The next prime is 9857355227. The reversal of 9857355197 is 7915537589.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5874609316 + 3982745881 = 76646^2 + 63109^2 .

It is a cyclic number.

It is not a de Polignac number, because 9857355197 - 2⁴ = 9857355181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9857355187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4928677598 + 4928677599.

It is an arithmetic number, because the mean of its divisors is an integer number (4928677599).

Almost surely, 2^9857355197 is an apocalyptic number.

It is an amenable number.

9857355197 is a deficient number, since it is larger than the sum of its proper divisors (1).

9857355197 is an equidigital number, since it uses as much as digits as its factorization.

9857355197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11907000, while the sum is 59.

The square root of 9857355197 is about 99284.2142387197. The cubic root of 9857355197 is about 2144.1416283192.

The spelling of 9857355197 in words is "nine billion, eight hundred fifty-seven million, three hundred fifty-five thousand, one hundred ninety-seven".