169345439 has 2 divisors, whose sum is σ = 169345440. Its totient is φ = 169345438.

The previous prime is 169345367. The next prime is 169345447. The reversal of 169345439 is 934543961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 169345439 - 2¹² = 169341343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 169345439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169345469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84672719 + 84672720.

It is an arithmetic number, because the mean of its divisors is an integer number (84672720).

Almost surely, 2^169345439 is an apocalyptic number.

169345439 is a deficient number, since it is larger than the sum of its proper divisors (1).

169345439 is an equidigital number, since it uses as much as digits as its factorization.

169345439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 44.

The square root of 169345439 is about 13013.2793330505. The cubic root of 169345439 is about 553.2539221292.

The spelling of 169345439 in words is "one hundred sixty-nine million, three hundred forty-five thousand, four hundred thirty-nine".