168889797 has 12 divisors (see below), whose sum is σ = 244294284. Its totient is φ = 112435200.

The previous prime is 168889789. The next prime is 168889837. The reversal of 168889797 is 797988861.

It can be written as a sum of positive squares in 2 ways, for example, as 167806116 + 1083681 = 12954^2 + 1041^2 .

It is not a de Polignac number, because 168889797 - 2³ = 168889789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168889717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6204 + ... + 19397.

It is an arithmetic number, because the mean of its divisors is an integer number (20357857).

Almost surely, 2^168889797 is an apocalyptic number.

It is an amenable number.

168889797 is a deficient number, since it is larger than the sum of its proper divisors (75404487).

168889797 is a wasteful number, since it uses less digits than its factorization.

168889797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26340 (or 26337 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 63.

The square root of 168889797 is about 12995.7607318695. The cubic root of 168889797 is about 552.7572801735.

The spelling of 168889797 in words is "one hundred sixty-eight million, eight hundred eighty-nine thousand, seven hundred ninety-seven".