168505369 has 2 divisors, whose sum is σ = 168505370. Its totient is φ = 168505368.

The previous prime is 168505339. The next prime is 168505397. The reversal of 168505369 is 963505861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118265625 + 50239744 = 10875^2 + 7088^2 .

It is a cyclic number.

It is not a de Polignac number, because 168505369 - 2¹⁹ = 167981081 is a prime.

It is a super-2 number, since 2×168505369² = 56788118763652322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168505339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84252684 + 84252685.

It is an arithmetic number, because the mean of its divisors is an integer number (84252685).

Almost surely, 2^168505369 is an apocalyptic number.

It is an amenable number.

168505369 is a deficient number, since it is larger than the sum of its proper divisors (1).

168505369 is an equidigital number, since it uses as much as digits as its factorization.

168505369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 168505369 is about 12980.9617902527. The cubic root of 168505369 is about 552.3375650468.

The spelling of 168505369 in words is "one hundred sixty-eight million, five hundred five thousand, three hundred sixty-nine".