169728641 has 2 divisors, whose sum is σ = 169728642. Its totient is φ = 169728640.

The previous prime is 169728623. The next prime is 169728673. The reversal of 169728641 is 146827961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117831025 + 51897616 = 10855^2 + 7204^2 .

It is a cyclic number.

It is not a de Polignac number, because 169728641 - 2¹⁰ = 169727617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 169728592 and 169728601.

It is not a weakly prime, because it can be changed into another prime (169728541) 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, 84864320 + 84864321.

It is an arithmetic number, because the mean of its divisors is an integer number (84864321).

Almost surely, 2^169728641 is an apocalyptic number.

It is an amenable number.

169728641 is a deficient number, since it is larger than the sum of its proper divisors (1).

169728641 is an equidigital number, since it uses as much as digits as its factorization.

169728641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 169728641 is about 13027.9945118195. The cubic root of 169728641 is about 553.6709165242.

The spelling of 169728641 in words is "one hundred sixty-nine million, seven hundred twenty-eight thousand, six hundred forty-one".