199995164 has 6 divisors (see below), whose sum is σ = 349991544. Its totient is φ = 99997580.

The previous prime is 199995163. The next prime is 199995179. The reversal of 199995164 is 461599991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199995163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24999392 + ... + 24999399.

It is an arithmetic number, because the mean of its divisors is an integer number (58331924).

Almost surely, 2^199995164 is an apocalyptic number.

It is an amenable number.

199995164 is a deficient number, since it is larger than the sum of its proper divisors (149996380).

199995164 is a wasteful number, since it uses less digits than its factorization.

199995164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49998795 (or 49998793 counting only the distinct ones).

The product of its digits is 787320, while the sum is 53.

The square root of 199995164 is about 14141.9646442777. The cubic root of 199995164 is about 584.7988340880.

The spelling of 199995164 in words is "one hundred ninety-nine million, nine hundred ninety-five thousand, one hundred sixty-four".