168651361 has 2 divisors, whose sum is σ = 168651362. Its totient is φ = 168651360.

The previous prime is 168651317. The next prime is 168651383. The reversal of 168651361 is 163156861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165251025 + 3400336 = 12855^2 + 1844^2 .

It is a cyclic number.

It is not a de Polignac number, because 168651361 - 2⁷ = 168651233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168651361.

It is not a weakly prime, because it can be changed into another prime (168651761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84325680 + 84325681.

It is an arithmetic number, because the mean of its divisors is an integer number (84325681).

Almost surely, 2^168651361 is an apocalyptic number.

It is an amenable number.

168651361 is a deficient number, since it is larger than the sum of its proper divisors (1).

168651361 is an equidigital number, since it uses as much as digits as its factorization.

168651361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 168651361 is about 12986.5838849175. The cubic root of 168651361 is about 552.4970329413.

The spelling of 168651361 in words is "one hundred sixty-eight million, six hundred fifty-one thousand, three hundred sixty-one".