169385129 has 2 divisors, whose sum is σ = 169385130. Its totient is φ = 169385128.

The previous prime is 169385119. The next prime is 169385159. The reversal of 169385129 is 921583961.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147744025 + 21641104 = 12155^2 + 4652^2 .

It is a cyclic number.

It is not a de Polignac number, because 169385129 - 2¹² = 169381033 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 169385129.

It is not a weakly prime, because it can be changed into another prime (169385119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84692564 + 84692565.

It is an arithmetic number, because the mean of its divisors is an integer number (84692565).

Almost surely, 2^169385129 is an apocalyptic number.

It is an amenable number.

169385129 is a deficient number, since it is larger than the sum of its proper divisors (1).

169385129 is an equidigital number, since it uses as much as digits as its factorization.

169385129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 44.

The square root of 169385129 is about 13014.8042244207. The cubic root of 169385129 is about 553.2971413483.

The spelling of 169385129 in words is "one hundred sixty-nine million, three hundred eighty-five thousand, one hundred twenty-nine".