199142209097 has 16 divisors (see below), whose sum is σ = 215644305408. Its totient is φ = 182809725120.

The previous prime is 199142209033. The next prime is 199142209117. The reversal of 199142209097 is 790902241991.

It is a cyclic number.

It is not a de Polignac number, because 199142209097 - 2⁶ = 199142209033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199142209027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10973243 + ... + 10991375.

It is an arithmetic number, because the mean of its divisors is an integer number (13477769088).

Almost surely, 2^199142209097 is an apocalyptic number.

It is an amenable number.

199142209097 is a deficient number, since it is larger than the sum of its proper divisors (16502096311).

199142209097 is a wasteful number, since it uses less digits than its factorization.

199142209097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22760.

The product of its (nonzero) digits is 734832, while the sum is 53.

The spelling of 199142209097 in words is "one hundred ninety-nine billion, one hundred forty-two million, two hundred nine thousand, ninety-seven".