209444524379 has 2 divisors, whose sum is σ = 209444524380. Its totient is φ = 209444524378.

The previous prime is 209444524357. The next prime is 209444524403. The reversal of 209444524379 is 973425444902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 209444524379 - 2⁸ = 209444524123 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 209444524379.

It is not a weakly prime, because it can be changed into another prime (209444524319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104722262189 + 104722262190.

It is an arithmetic number, because the mean of its divisors is an integer number (104722262190).

Almost surely, 2^209444524379 is an apocalyptic number.

209444524379 is a deficient number, since it is larger than the sum of its proper divisors (1).

209444524379 is an equidigital number, since it uses as much as digits as its factorization.

209444524379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 209444524379 in words is "two hundred nine billion, four hundred forty-four million, five hundred twenty-four thousand, three hundred seventy-nine".