199704959999 has 4 divisors (see below), whose sum is σ = 206591337960. Its totient is φ = 192818582040.

The previous prime is 199704959929. The next prime is 199704960019. The reversal of 199704959999 is 999959407991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999959407991 = 479 ⋅2087597929.

It is a cyclic number.

It is not a de Polignac number, because 199704959999 - 2⁸ = 199704959743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199704959929) 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, 3443188937 + ... + 3443188994.

It is an arithmetic number, because the mean of its divisors is an integer number (51647834490).

Almost surely, 2^199704959999 is an apocalyptic number.

199704959999 is a deficient number, since it is larger than the sum of its proper divisors (6886377961).

199704959999 is an equidigital number, since it uses as much as digits as its factorization.

199704959999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6886377960.

The product of its (nonzero) digits is 669615660, while the sum is 80.

The spelling of 199704959999 in words is "one hundred ninety-nine billion, seven hundred four million, nine hundred fifty-nine thousand, nine hundred ninety-nine".