169539421 has 8 divisors (see below), whose sum is σ = 173492280. Its totient is φ = 165614592.

The previous prime is 169539401. The next prime is 169539427. The reversal of 169539421 is 124935961.

It can be written as a sum of positive squares in 4 ways, for example, as 13039321 + 156500100 = 3611^2 + 12510^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 169539421 - 2⁵ = 169539389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169539427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5485 + ... + 19213.

It is an arithmetic number, because the mean of its divisors is an integer number (21686535).

Almost surely, 2^169539421 is an apocalyptic number.

It is an amenable number.

169539421 is a deficient number, since it is larger than the sum of its proper divisors (3952859).

169539421 is a wasteful number, since it uses less digits than its factorization.

169539421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14015.

The product of its digits is 58320, while the sum is 40.

The square root of 169539421 is about 13020.7304326601. The cubic root of 169539421 is about 553.4650888246.

The spelling of 169539421 in words is "one hundred sixty-nine million, five hundred thirty-nine thousand, four hundred twenty-one".