166944439 has 2 divisors, whose sum is σ = 166944440. Its totient is φ = 166944438.

The previous prime is 166944413. The next prime is 166944461. The reversal of 166944439 is 934449661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166944439 - 2¹³ = 166936247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166944839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83472219 + 83472220.

It is an arithmetic number, because the mean of its divisors is an integer number (83472220).

Almost surely, 2^166944439 is an apocalyptic number.

166944439 is a deficient number, since it is larger than the sum of its proper divisors (1).

166944439 is an equidigital number, since it uses as much as digits as its factorization.

166944439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 46.

The square root of 166944439 is about 12920.6980848559. The cubic root of 166944439 is about 550.6267664728.

The spelling of 166944439 in words is "one hundred sixty-six million, nine hundred forty-four thousand, four hundred thirty-nine".