169980321 has 16 divisors (see below), whose sum is σ = 259200000. Its totient is φ = 97063248.

The previous prime is 169980277. The next prime is 169980323. The reversal of 169980321 is 123089961.

It is not a de Polignac number, because 169980321 - 2¹³ = 169972129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 169980321.

It is not an unprimeable number, because it can be changed into a prime (169980323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55180 + ... + 58178.

It is an arithmetic number, because the mean of its divisors is an integer number (16200000).

Almost surely, 2^169980321 is an apocalyptic number.

It is an amenable number.

169980321 is a deficient number, since it is larger than the sum of its proper divisors (89219679).

169980321 is a wasteful number, since it uses less digits than its factorization.

169980321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5708.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 169980321 is about 13037.6501333638. The cubic root of 169980321 is about 553.9444493732.

The spelling of 169980321 in words is "one hundred sixty-nine million, nine hundred eighty thousand, three hundred twenty-one".