199979707 has 8 divisors (see below), whose sum is σ = 202586400. Its totient is φ = 197381184.

The previous prime is 199979701. The next prime is 199979743. The reversal of 199979707 is 707979991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199979707 - 2³ = 199979699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199979701) 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 7 ways as a sum of consecutive naturals, for example, 58594 + ... + 61912.

It is an arithmetic number, because the mean of its divisors is an integer number (25323300).

Almost surely, 2^199979707 is an apocalyptic number.

199979707 is a deficient number, since it is larger than the sum of its proper divisors (2606693).

199979707 is an equidigital number, since it uses as much as digits as its factorization.

199979707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4085.

The product of its (nonzero) digits is 2250423, while the sum is 58.

The square root of 199979707 is about 14141.4181396351. The cubic root of 199979707 is about 584.7837679429.

The spelling of 199979707 in words is "one hundred ninety-nine million, nine hundred seventy-nine thousand, seven hundred seven".