199917971383 has 16 divisors (see below), whose sum is σ = 215980914240. Its totient is φ = 183953419776.

The previous prime is 199917971377. The next prime is 199917971401. The reversal of 199917971383 is 383179719991.

199917971383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 199917971383 - 2²⁵ = 199884416951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199917071383) 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 in 15 ways as a sum of consecutive naturals, for example, 8975166 + ... + 8997412.

It is an arithmetic number, because the mean of its divisors is an integer number (13498807140).

Almost surely, 2^199917971383 is an apocalyptic number.

199917971383 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

199917971383 is a deficient number, since it is larger than the sum of its proper divisors (16062942857).

199917971383 is a wasteful number, since it uses less digits than its factorization.

199917971383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24426.

The product of its digits is 23147208, while the sum is 67.

The spelling of 199917971383 in words is "one hundred ninety-nine billion, nine hundred seventeen million, nine hundred seventy-one thousand, three hundred eighty-three".