199905764 has 12 divisors (see below), whose sum is σ = 368247600. Its totient is φ = 94692168.

The previous prime is 199905751. The next prime is 199905773. The reversal of 199905764 is 467509991.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315094 + ... + 1315245.

It is an arithmetic number, because the mean of its divisors is an integer number (30687300).

Almost surely, 2^199905764 is an apocalyptic number.

It is an amenable number.

199905764 is a deficient number, since it is larger than the sum of its proper divisors (168341836).

199905764 is a wasteful number, since it uses less digits than its factorization.

199905764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630362 (or 2630360 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 199905764 is about 14138.8034854439. The cubic root of 199905764 is about 584.7116839678.

The spelling of 199905764 in words is "one hundred ninety-nine million, nine hundred five thousand, seven hundred sixty-four".