169440143 has 2 divisors, whose sum is σ = 169440144. Its totient is φ = 169440142.

The previous prime is 169440121. The next prime is 169440169. The reversal of 169440143 is 341044961.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 169440143 - 2¹⁴ = 169423759 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169448143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84720071 + 84720072.

It is an arithmetic number, because the mean of its divisors is an integer number (84720072).

Almost surely, 2^169440143 is an apocalyptic number.

169440143 is a deficient number, since it is larger than the sum of its proper divisors (1).

169440143 is an equidigital number, since it uses as much as digits as its factorization.

169440143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 169440143 is about 13016.9175690714. The cubic root of 169440143 is about 553.3570360083.

The spelling of 169440143 in words is "one hundred sixty-nine million, four hundred forty thousand, one hundred forty-three".