199247001897 has 16 divisors (see below), whose sum is σ = 267708672000. Its totient is φ = 131811856512.

The previous prime is 199247001887. The next prime is 199247001913. The reversal of 199247001897 is 798100742991.

199247001897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199247001897 - 2⁴ = 199247001881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199247001847) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 213772 + ... + 666477.

It is an arithmetic number, because the mean of its divisors is an integer number (16731792000).

Almost surely, 2^199247001897 is an apocalyptic number.

It is an amenable number.

199247001897 is a deficient number, since it is larger than the sum of its proper divisors (68461670103).

199247001897 is a wasteful number, since it uses less digits than its factorization.

199247001897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880832.

The product of its (nonzero) digits is 2286144, while the sum is 57.

The spelling of 199247001897 in words is "one hundred ninety-nine billion, two hundred forty-seven million, one thousand, eight hundred ninety-seven".