199999892 has 18 divisors (see below), whose sum is σ = 362491038. Its totient is φ = 96550048.

The previous prime is 199999889. The next prime is 199999901. The reversal of 199999892 is 298999991.

It can be written as a sum of positive squares in 3 ways, for example, as 62031376 + 137968516 = 7876^2 + 11746^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26363 + ... + 33090.

It is an arithmetic number, because the mean of its divisors is an integer number (20138391).

Almost surely, 2^199999892 is an apocalyptic number.

It is an amenable number.

199999892 is a deficient number, since it is larger than the sum of its proper divisors (162491146).

199999892 is a wasteful number, since it uses less digits than its factorization.

199999892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59515 (or 59484 counting only the distinct ones).

The product of its digits is 8503056, while the sum is 65.

The square root of 199999892 is about 14142.1318053538. The cubic root of 199999892 is about 584.8034423779.

Subtracting 199999892 from its reverse (298999991), we obtain a palindrome (99000099).

It can be divided in two parts, 19999989 and 2, that added together give a palindrome (19999991).

The spelling of 199999892 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred ninety-two".