169520213 has 2 divisors, whose sum is σ = 169520214. Its totient is φ = 169520212.

The previous prime is 169520203. The next prime is 169520291. The reversal of 169520213 is 312025961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144048004 + 25472209 = 12002^2 + 5047^2 .

It is a cyclic number.

It is not a de Polignac number, because 169520213 - 2⁶ = 169520149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169520203) 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, 84760106 + 84760107.

It is an arithmetic number, because the mean of its divisors is an integer number (84760107).

Almost surely, 2^169520213 is an apocalyptic number.

It is an amenable number.

169520213 is a deficient number, since it is larger than the sum of its proper divisors (1).

169520213 is an equidigital number, since it uses as much as digits as its factorization.

169520213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 169520213 is about 13019.9928187384. The cubic root of 169520213 is about 553.4441863920. Note that the first 3 decimals are identical.

The spelling of 169520213 in words is "one hundred sixty-nine million, five hundred twenty thousand, two hundred thirteen".