197168091 has 32 divisors (see below), whose sum is σ = 288976896. Its totient is φ = 119040000.

The previous prime is 197168089. The next prime is 197168093. The reversal of 197168091 is 190861791.

It is an interprime number because it is at equal distance from previous prime (197168089) and next prime (197168093).

It is not a de Polignac number, because 197168091 - 2¹ = 197168089 is a prime.

It is a super-2 number, since 2×197168091² = 77750512217168562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (197168093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 491491 + ... + 491891.

It is an arithmetic number, because the mean of its divisors is an integer number (9030528).

Almost surely, 2^197168091 is an apocalyptic number.

197168091 is a deficient number, since it is larger than the sum of its proper divisors (91808805).

197168091 is a wasteful number, since it uses less digits than its factorization.

197168091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763.

The product of its (nonzero) digits is 27216, while the sum is 42.

The square root of 197168091 is about 14041.6555647830. The cubic root of 197168091 is about 582.0302324844.

The spelling of 197168091 in words is "one hundred ninety-seven million, one hundred sixty-eight thousand, ninety-one".