168442197 has 16 divisors (see below), whose sum is σ = 280008192. Its totient is φ = 87502320.

The previous prime is 168442193. The next prime is 168442199. The reversal of 168442197 is 791244861.

It is not a de Polignac number, because 168442197 - 2² = 168442193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168442193) 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, 364363 + ... + 364824.

It is an arithmetic number, because the mean of its divisors is an integer number (17500512).

Almost surely, 2^168442197 is an apocalyptic number.

It is an amenable number.

168442197 is a deficient number, since it is larger than the sum of its proper divisors (111565995).

168442197 is a wasteful number, since it uses less digits than its factorization.

168442197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729208.

The product of its digits is 96768, while the sum is 42.

The square root of 168442197 is about 12978.5283063990. The cubic root of 168442197 is about 552.2685333594.

The spelling of 168442197 in words is "one hundred sixty-eight million, four hundred forty-two thousand, one hundred ninety-seven".