199800587 has 8 divisors (see below), whose sum is σ = 233004000. Its totient is φ = 171257352.

The previous prime is 199800581. The next prime is 199800589. The reversal of 199800587 is 785008991.

It is a happy number.

It is not a de Polignac number, because 199800587 - 2⁴ = 199800571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199800581) 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, 290912 + ... + 291597.

It is an arithmetic number, because the mean of its divisors is an integer number (29125500).

Almost surely, 2^199800587 is an apocalyptic number.

199800587 is a deficient number, since it is larger than the sum of its proper divisors (33203413).

199800587 is an frugal number, since it uses more digits than its factorization.

199800587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582530 (or 582516 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 199800587 is about 14135.0835512211. The cubic root of 199800587 is about 584.6091206264.

The spelling of 199800587 in words is "one hundred ninety-nine million, eight hundred thousand, five hundred eighty-seven".