199757849983 has 2 divisors, whose sum is σ = 199757849984. Its totient is φ = 199757849982.

The previous prime is 199757849981. The next prime is 199757850011. The reversal of 199757849983 is 389948757991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199757849983 - 2¹ = 199757849981 is a prime.

Together with 199757849981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199757849981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99878924991 + 99878924992.

It is an arithmetic number, because the mean of its divisors is an integer number (99878924992).

Almost surely, 2^199757849983 is an apocalyptic number.

199757849983 is a deficient number, since it is larger than the sum of its proper divisors (1).

199757849983 is an equidigital number, since it uses as much as digits as its factorization.

199757849983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1234517760, while the sum is 79.

The spelling of 199757849983 in words is "one hundred ninety-nine billion, seven hundred fifty-seven million, eight hundred forty-nine thousand, nine hundred eighty-three".