199999432 has 8 divisors (see below), whose sum is σ = 374998950. Its totient is φ = 99999712.

The previous prime is 199999427. The next prime is 199999447. The reversal of 199999432 is 234999991.

It can be written as a sum of positive squares in only one way, i.e., 197290116 + 2709316 = 14046^2 + 1646^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12499957 + ... + 12499972.

Almost surely, 2^199999432 is an apocalyptic number.

It is an amenable number.

199999432 is a deficient number, since it is larger than the sum of its proper divisors (174999518).

199999432 is a wasteful number, since it uses less digits than its factorization.

199999432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24999935 (or 24999931 counting only the distinct ones).

The product of its digits is 1417176, while the sum is 55.

The square root of 199999432 is about 14142.1155418841. The cubic root of 199999432 is about 584.8029940280.

The spelling of 199999432 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, four hundred thirty-two".