199959607 has 4 divisors (see below), whose sum is σ = 200068240. Its totient is φ = 199850976.

The previous prime is 199959587. The next prime is 199959623. The reversal of 199959607 is 706959991.

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 199959607 - 2¹¹ = 199957559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199959707) 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, 51507 + ... + 55252.

It is an arithmetic number, because the mean of its divisors is an integer number (50017060).

Almost surely, 2^199959607 is an apocalyptic number.

199959607 is a deficient number, since it is larger than the sum of its proper divisors (108633).

199959607 is a wasteful number, since it uses less digits than its factorization.

199959607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108632.

The product of its (nonzero) digits is 1377810, while the sum is 55.

The square root of 199959607 is about 14140.7074434061. The cubic root of 199959607 is about 584.7641750423.

The spelling of 199959607 in words is "one hundred ninety-nine million, nine hundred fifty-nine thousand, six hundred seven".