199237985 has 16 divisors (see below), whose sum is σ = 243734400. Its totient is φ = 156304896.

The previous prime is 199237957. The next prime is 199237993. The reversal of 199237985 is 589732991.

It is a cyclic number.

It is not a de Polignac number, because 199237985 - 2⁸ = 199237729 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214001 + ... + 214929.

It is an arithmetic number, because the mean of its divisors is an integer number (15233400).

Almost surely, 2^199237985 is an apocalyptic number.

It is an amenable number.

199237985 is a deficient number, since it is larger than the sum of its proper divisors (44496415).

199237985 is an equidigital number, since it uses as much as digits as its factorization.

199237985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720.

The product of its digits is 1224720, while the sum is 53.

The square root of 199237985 is about 14115.1686139415. The cubic root of 199237985 is about 584.0598872485.

The spelling of 199237985 in words is "one hundred ninety-nine million, two hundred thirty-seven thousand, nine hundred eighty-five".