169997538 has 8 divisors (see below), whose sum is σ = 339995088. Its totient is φ = 56665844.

The previous prime is 169997537. The next prime is 169997557. The reversal of 169997538 is 835799961.

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

169997538 is an admirable number.

It is a super-2 number, since 2×169997538² = 57798325852122888, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (169997537) 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 in 3 ways as a sum of consecutive naturals, for example, 14166456 + ... + 14166467.

It is an arithmetic number, because the mean of its divisors is an integer number (42499386).

Almost surely, 2^169997538 is an apocalyptic number.

169997538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

169997538 is a wasteful number, since it uses less digits than its factorization.

169997538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28332928.

The product of its digits is 3674160, while the sum is 57.

The square root of 169997538 is about 13038.3103966733. The cubic root of 169997538 is about 553.9631514197.

The spelling of 169997538 in words is "one hundred sixty-nine million, nine hundred ninety-seven thousand, five hundred thirty-eight".