169285993 has 2 divisors, whose sum is σ = 169285994. Its totient is φ = 169285992.

The previous prime is 169285981. The next prime is 169285997. The reversal of 169285993 is 399582961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142277184 + 27008809 = 11928^2 + 5197^2 .

It is a cyclic number.

It is not a de Polignac number, because 169285993 - 2⁹ = 169285481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 169285993.

It is not a weakly prime, because it can be changed into another prime (169285997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84642996 + 84642997.

It is an arithmetic number, because the mean of its divisors is an integer number (84642997).

Almost surely, 2^169285993 is an apocalyptic number.

It is an amenable number.

169285993 is a deficient number, since it is larger than the sum of its proper divisors (1).

169285993 is an equidigital number, since it uses as much as digits as its factorization.

169285993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1049760, while the sum is 52.

The square root of 169285993 is about 13010.9950810843. The cubic root of 169285993 is about 553.1891775811.

The spelling of 169285993 in words is "one hundred sixty-nine million, two hundred eighty-five thousand, nine hundred ninety-three".