199270639 has 8 divisors (see below), whose sum is σ = 201492720. Its totient is φ = 197055936.

The previous prime is 199270637. The next prime is 199270679. The reversal of 199270639 is 936072991.

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 199270639 - 2¹ = 199270637 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 (199270637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65772 + ... + 68734.

It is an arithmetic number, because the mean of its divisors is an integer number (25186590).

Almost surely, 2^199270639 is an apocalyptic number.

199270639 is a deficient number, since it is larger than the sum of its proper divisors (2222081).

199270639 is a wasteful number, since it uses less digits than its factorization.

199270639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 199270639 is about 14116.3252654506. The cubic root of 199270639 is about 584.0917935635.

The spelling of 199270639 in words is "one hundred ninety-nine million, two hundred seventy thousand, six hundred thirty-nine".