168189497 has 8 divisors (see below), whose sum is σ = 195086016. Its totient is φ = 142010352.

The previous prime is 168189493. The next prime is 168189509. The reversal of 168189497 is 794981861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168189497 - 2² = 168189493 is a prime.

It is a super-2 number, since 2×168189497² = 56575413802226018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168189491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178838 + ... + 179775.

It is an arithmetic number, because the mean of its divisors is an integer number (24385752).

Almost surely, 2^168189497 is an apocalyptic number.

It is an amenable number.

168189497 is a deficient number, since it is larger than the sum of its proper divisors (26896519).

168189497 is an equidigital number, since it uses as much as digits as its factorization.

168189497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358687.

The product of its digits is 870912, while the sum is 53.

The square root of 168189497 is about 12968.7893421090. The cubic root of 168189497 is about 551.9922207561.

The spelling of 168189497 in words is "one hundred sixty-eight million, one hundred eighty-nine thousand, four hundred ninety-seven".