201867983897 has 2 divisors, whose sum is σ = 201867983898. Its totient is φ = 201867983896.

The previous prime is 201867983873. The next prime is 201867983899. The reversal of 201867983897 is 798389768102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198217286656 + 3650697241 = 445216^2 + 60421^2 .

It is a cyclic number.

It is not a de Polignac number, because 201867983897 - 2¹⁸ = 201867721753 is a prime.

Together with 201867983899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201867983899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100933991948 + 100933991949.

It is an arithmetic number, because the mean of its divisors is an integer number (100933991949).

Almost surely, 2^201867983897 is an apocalyptic number.

It is an amenable number.

201867983897 is a deficient number, since it is larger than the sum of its proper divisors (1).

201867983897 is an equidigital number, since it uses as much as digits as its factorization.

201867983897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73156608, while the sum is 68.

The spelling of 201867983897 in words is "two hundred one billion, eight hundred sixty-seven million, nine hundred eighty-three thousand, eight hundred ninety-seven".