169138938 has 16 divisors (see below), whose sum is σ = 339435936. Its totient is φ = 56186640.

The previous prime is 169138913. The next prime is 169138939. The reversal of 169138938 is 839831961.

It is not an unprimeable number, because it can be changed into a prime (169138939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46348 + ... + 49863.

It is an arithmetic number, because the mean of its divisors is an integer number (21214746).

Almost surely, 2^169138938 is an apocalyptic number.

169138938 is an abundant number, since it is smaller than the sum of its proper divisors (170296998).

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

169138938 is a wasteful number, since it uses less digits than its factorization.

169138938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96509.

The product of its digits is 279936, while the sum is 48.

The square root of 169138938 is about 13005.3426713793. The cubic root of 169138938 is about 553.0289501067.

The spelling of 169138938 in words is "one hundred sixty-nine million, one hundred thirty-eight thousand, nine hundred thirty-eight".