168445573 has 2 divisors, whose sum is σ = 168445574. Its totient is φ = 168445572.

The previous prime is 168445559. The next prime is 168445591. The reversal of 168445573 is 375544861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129095044 + 39350529 = 11362^2 + 6273^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168445573 is a prime.

It is a super-2 number, since 2×168445573² = 56747822126596658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168445513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84222786 + 84222787.

It is an arithmetic number, because the mean of its divisors is an integer number (84222787).

Almost surely, 2^168445573 is an apocalyptic number.

It is an amenable number.

168445573 is a deficient number, since it is larger than the sum of its proper divisors (1).

168445573 is an equidigital number, since it uses as much as digits as its factorization.

168445573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 43.

The square root of 168445573 is about 12978.6583667188. The cubic root of 168445573 is about 552.2722229458.

The spelling of 168445573 in words is "one hundred sixty-eight million, four hundred forty-five thousand, five hundred seventy-three".