168897909 has 8 divisors (see below), whose sum is σ = 229446432. Its totient is φ = 110474000.

The previous prime is 168897899. The next prime is 168897913. The reversal of 168897909 is 909798861.

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 168897909 - 2⁴ = 168897893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168897919) 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, 530967 + ... + 531284.

It is an arithmetic number, because the mean of its divisors is an integer number (28680804).

Almost surely, 2^168897909 is an apocalyptic number.

It is an amenable number.

168897909 is a deficient number, since it is larger than the sum of its proper divisors (60548523).

168897909 is a wasteful number, since it uses less digits than its factorization.

168897909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062307.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The square root of 168897909 is about 12996.0728298975. The cubic root of 168897909 is about 552.7661299193.

The spelling of 168897909 in words is "one hundred sixty-eight million, eight hundred ninety-seven thousand, nine hundred nine".