199889000939 has 2 divisors, whose sum is σ = 199889000940. Its totient is φ = 199889000938.

The previous prime is 199889000933. The next prime is 199889000977. The reversal of 199889000939 is 939000988991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199889000939 - 2¹⁶ = 199888935403 is a prime.

It is a super-2 number, since 2×199889000939² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199889000933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99944500469 + 99944500470.

It is an arithmetic number, because the mean of its divisors is an integer number (99944500470).

Almost surely, 2^199889000939 is an apocalyptic number.

199889000939 is a deficient number, since it is larger than the sum of its proper divisors (1).

199889000939 is an equidigital number, since it uses as much as digits as its factorization.

199889000939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11337408, while the sum is 65.

The spelling of 199889000939 in words is "one hundred ninety-nine billion, eight hundred eighty-nine million, nine hundred thirty-nine", and thus it is an aban number.