168222891097 has 2 divisors, whose sum is σ = 168222891098. Its totient is φ = 168222891096.

The previous prime is 168222891061. The next prime is 168222891107. The reversal of 168222891097 is 790198222861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134769017881 + 33453873216 = 367109^2 + 182904^2 .

It is a cyclic number.

It is not a de Polignac number, because 168222891097 - 2²⁷ = 168088673369 is a prime.

It is not a weakly prime, because it can be changed into another prime (168222891017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84111445548 + 84111445549.

It is an arithmetic number, because the mean of its divisors is an integer number (84111445549).

Almost surely, 2^168222891097 is an apocalyptic number.

It is an amenable number.

168222891097 is a deficient number, since it is larger than the sum of its proper divisors (1).

168222891097 is an equidigital number, since it uses as much as digits as its factorization.

168222891097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 168222891097 in words is "one hundred sixty-eight billion, two hundred twenty-two million, eight hundred ninety-one thousand, ninety-seven".