163566413 has 2 divisors, whose sum is σ = 163566414. Its totient is φ = 163566412.

The previous prime is 163566391. The next prime is 163566449. The reversal of 163566413 is 314665361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151856329 + 11710084 = 12323^2 + 3422^2 .

It is a cyclic number.

It is not a de Polignac number, because 163566413 - 2¹⁸ = 163304269 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163566713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81783206 + 81783207.

It is an arithmetic number, because the mean of its divisors is an integer number (81783207).

Almost surely, 2^163566413 is an apocalyptic number.

It is an amenable number.

163566413 is a deficient number, since it is larger than the sum of its proper divisors (1).

163566413 is an equidigital number, since it uses as much as digits as its factorization.

163566413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The square root of 163566413 is about 12789.3085426852. The cubic root of 163566413 is about 546.8875582553.

The spelling of 163566413 in words is "one hundred sixty-three million, five hundred sixty-six thousand, four hundred thirteen".