196857821047 has 2 divisors, whose sum is σ = 196857821048. Its totient is φ = 196857821046.

The previous prime is 196857821033. The next prime is 196857821119. The reversal of 196857821047 is 740128758691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196857821047 - 2²⁷ = 196723603319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 196857820982 and 196857821000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196857881047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98428910523 + 98428910524.

It is an arithmetic number, because the mean of its divisors is an integer number (98428910524).

Almost surely, 2^196857821047 is an apocalyptic number.

196857821047 is a deficient number, since it is larger than the sum of its proper divisors (1).

196857821047 is an equidigital number, since it uses as much as digits as its factorization.

196857821047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6773760, while the sum is 58.

The spelling of 196857821047 in words is "one hundred ninety-six billion, eight hundred fifty-seven million, eight hundred twenty-one thousand, forty-seven".