169394081 has 2 divisors, whose sum is σ = 169394082. Its totient is φ = 169394080.

The previous prime is 169394059. The next prime is 169394089. The reversal of 169394081 is 180493961.

169394081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169234081 + 160000 = 13009^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 169394081 - 2¹⁰ = 169393057 is a prime.

It is a super-2 number, since 2×169394081² = 57388709355669122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (169394089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84697040 + 84697041.

It is an arithmetic number, because the mean of its divisors is an integer number (84697041).

Almost surely, 2^169394081 is an apocalyptic number.

It is an amenable number.

169394081 is a deficient number, since it is larger than the sum of its proper divisors (1).

169394081 is an equidigital number, since it uses as much as digits as its factorization.

169394081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 169394081 is about 13015.1481359222. The cubic root of 169394081 is about 553.3068884234.

The spelling of 169394081 in words is "one hundred sixty-nine million, three hundred ninety-four thousand, eighty-one".