199664495 has 8 divisors (see below), whose sum is σ = 250014816. Its totient is φ = 152786656.

The previous prime is 199664467. The next prime is 199664497. The reversal of 199664495 is 594466991.

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 199664495 - 2⁸ = 199664239 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 (199664497) 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, 867992 + ... + 868221.

It is an arithmetic number, because the mean of its divisors is an integer number (31251852).

Almost surely, 2^199664495 is an apocalyptic number.

199664495 is a deficient number, since it is larger than the sum of its proper divisors (50350321).

199664495 is a wasteful number, since it uses less digits than its factorization.

199664495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736241.

The product of its digits is 2099520, while the sum is 53.

The square root of 199664495 is about 14130.2687518674. The cubic root of 199664495 is about 584.4763570938.

The spelling of 199664495 in words is "one hundred ninety-nine million, six hundred sixty-four thousand, four hundred ninety-five".