169988942 has 16 divisors (see below), whose sum is σ = 260850240. Its totient is φ = 83045088.

The previous prime is 169988941. The next prime is 169988947. The reversal of 169988942 is 249889961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169988941) 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 7 ways as a sum of consecutive naturals, for example, 73784 + ... + 76052.

It is an arithmetic number, because the mean of its divisors is an integer number (16303140).

Almost surely, 2^169988942 is an apocalyptic number.

169988942 is a deficient number, since it is larger than the sum of its proper divisors (90861298).

169988942 is a wasteful number, since it uses less digits than its factorization.

169988942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3115.

The product of its digits is 2239488, while the sum is 56.

The square root of 169988942 is about 13037.9807485669. The cubic root of 169988942 is about 553.9538141325.

The spelling of 169988942 in words is "one hundred sixty-nine million, nine hundred eighty-eight thousand, nine hundred forty-two".