169142389 has 16 divisors (see below), whose sum is σ = 192628800. Its totient is φ = 147229056.

The previous prime is 169142381. The next prime is 169142399. The reversal of 169142389 is 983241961.

It is a happy number.

It is not a de Polignac number, because 169142389 - 2³ = 169142381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169142381) 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 15 ways as a sum of consecutive naturals, for example, 56082 + ... + 59020.

It is an arithmetic number, because the mean of its divisors is an integer number (12039300).

Almost surely, 2^169142389 is an apocalyptic number.

169142389 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

169142389 is a deficient number, since it is larger than the sum of its proper divisors (23486411).

169142389 is a wasteful number, since it uses less digits than its factorization.

169142389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204.

The product of its digits is 93312, while the sum is 43.

The square root of 169142389 is about 13005.4753469452. The cubic root of 169142389 is about 553.0327112945.

The spelling of 169142389 in words is "one hundred sixty-nine million, one hundred forty-two thousand, three hundred eighty-nine".