199434199499 has 4 divisors (see below), whose sum is σ = 199450957920. Its totient is φ = 199417441080.

The previous prime is 199434199403. The next prime is 199434199507. The reversal of 199434199499 is 994991434991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 994991434991 = 449 ⋅2216016559.

It is a cyclic number.

It is not a de Polignac number, because 199434199499 - 2¹⁶ = 199434133963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199434199099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8361347 + ... + 8385164.

It is an arithmetic number, because the mean of its divisors is an integer number (49862739480).

Almost surely, 2^199434199499 is an apocalyptic number.

199434199499 is a deficient number, since it is larger than the sum of its proper divisors (16758421).

199434199499 is a wasteful number, since it uses less digits than its factorization.

199434199499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16758420.

The product of its digits is 102036672, while the sum is 71.

The spelling of 199434199499 in words is "one hundred ninety-nine billion, four hundred thirty-four million, one hundred ninety-nine thousand, four hundred ninety-nine".