169608021013 has 2 divisors, whose sum is σ = 169608021014. Its totient is φ = 169608021012.

The previous prime is 169608020999. The next prime is 169608021049. The reversal of 169608021013 is 310120806961.

169608021013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87744511089 + 81863509924 = 296217^2 + 286118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169608021013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169608028013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84804010506 + 84804010507.

It is an arithmetic number, because the mean of its divisors is an integer number (84804010507).

Almost surely, 2^169608021013 is an apocalyptic number.

It is an amenable number.

169608021013 is a deficient number, since it is larger than the sum of its proper divisors (1).

169608021013 is an equidigital number, since it uses as much as digits as its factorization.

169608021013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

Adding to 169608021013 its reverse (310120806961), we get a palindrome (479728827974).

The spelling of 169608021013 in words is "one hundred sixty-nine billion, six hundred eight million, twenty-one thousand, thirteen".