168794881 has 2 divisors, whose sum is σ = 168794882. Its totient is φ = 168794880.

The previous prime is 168794867. The next prime is 168794911. The reversal of 168794881 is 188497861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159794881 + 9000000 = 12641^2 + 3000^2 .

It is a cyclic number.

It is not a de Polignac number, because 168794881 - 2⁹ = 168794369 is a prime.

It is a super-2 number, since 2×168794881² = 56983423703608322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168794981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84397440 + 84397441.

It is an arithmetic number, because the mean of its divisors is an integer number (84397441).

Almost surely, 2^168794881 is an apocalyptic number.

It is an amenable number.

168794881 is a deficient number, since it is larger than the sum of its proper divisors (1).

168794881 is an equidigital number, since it uses as much as digits as its factorization.

168794881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 52.

The square root of 168794881 is about 12992.1084124171. The cubic root of 168794881 is about 552.6537109773.

The spelling of 168794881 in words is "one hundred sixty-eight million, seven hundred ninety-four thousand, eight hundred eighty-one".