169438943 has 4 divisors (see below), whose sum is σ = 169779000. Its totient is φ = 169098888.

The previous prime is 169438889. The next prime is 169438981. The reversal of 169438943 is 349834961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 169438943 - 2⁶ = 169438879 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169438993) 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 3 ways as a sum of consecutive naturals, for example, 169280 + ... + 170277.

It is an arithmetic number, because the mean of its divisors is an integer number (42444750).

Almost surely, 2^169438943 is an apocalyptic number.

169438943 is a deficient number, since it is larger than the sum of its proper divisors (340057).

169438943 is an equidigital number, since it uses as much as digits as its factorization.

169438943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340056.

The product of its digits is 559872, while the sum is 47.

The square root of 169438943 is about 13016.8714751280. The cubic root of 169438943 is about 553.3557296865.

The spelling of 169438943 in words is "one hundred sixty-nine million, four hundred thirty-eight thousand, nine hundred forty-three".