43909239507871 has 2 divisors, whose sum is σ = 43909239507872. Its totient is φ = 43909239507870.

The previous prime is 43909239507751. The next prime is 43909239507983. The reversal of 43909239507871 is 17870593290934.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43909239507871 - 2¹³ = 43909239499679 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43909239507797 and 43909239507806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43909239507671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21954619753935 + 21954619753936.

It is an arithmetic number, because the mean of its divisors is an integer number (21954619753936).

Almost surely, 2^{43909239507871} is an apocalyptic number.

43909239507871 is a deficient number, since it is larger than the sum of its proper divisors (1).

43909239507871 is an equidigital number, since it uses as much as digits as its factorization.

43909239507871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102876480, while the sum is 67.

The spelling of 43909239507871 in words is "forty-three trillion, nine hundred nine billion, two hundred thirty-nine million, five hundred seven thousand, eight hundred seventy-one".