168989697 has 6 divisors (see below), whose sum is σ = 244096242. Its totient is φ = 112659792.

The previous prime is 168989683. The next prime is 168989719. The reversal of 168989697 is 796989861.

It can be written as a sum of positive squares in only one way, i.e., 161569521 + 7420176 = 12711^2 + 2724^2 .

It is not a de Polignac number, because 168989697 - 2¹⁸ = 168727553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168989797) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9388308 + ... + 9388325.

It is an arithmetic number, because the mean of its divisors is an integer number (40682707).

Almost surely, 2^168989697 is an apocalyptic number.

It is an amenable number.

168989697 is a deficient number, since it is larger than the sum of its proper divisors (75106545).

168989697 is a wasteful number, since it uses less digits than its factorization.

168989697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18776639 (or 18776636 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 168989697 is about 12999.6037247295. The cubic root of 168989697 is about 552.8662458404.

The spelling of 168989697 in words is "one hundred sixty-eight million, nine hundred eighty-nine thousand, six hundred ninety-seven".