199394022979 has 4 divisors (see below), whose sum is σ = 200964054784. Its totient is φ = 197823991176.

The previous prime is 199394022953. The next prime is 199394022983. The reversal of 199394022979 is 979220493991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 199394022979 - 2²¹ = 199391925827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199394022979.

It is not an unprimeable number, because it can be changed into a prime (199394022929) 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, 785015712 + ... + 785015965.

It is an arithmetic number, because the mean of its divisors is an integer number (50241013696).

Almost surely, 2^199394022979 is an apocalyptic number.

199394022979 is a deficient number, since it is larger than the sum of its proper divisors (1570031805).

199394022979 is a wasteful number, since it uses less digits than its factorization.

199394022979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570031804.

The product of its (nonzero) digits is 19840464, while the sum is 64.

The spelling of 199394022979 in words is "one hundred ninety-nine billion, three hundred ninety-four million, twenty-two thousand, nine hundred seventy-nine".