39789387520243 has 2 divisors, whose sum is σ = 39789387520244. Its totient is φ = 39789387520242.

The previous prime is 39789387520229. The next prime is 39789387520249. The reversal of 39789387520243 is 34202578398793.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39789387520243 is a prime.

It is not a weakly prime, because it can be changed into another prime (39789387520249) 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, 19894693760121 + 19894693760122.

It is an arithmetic number, because the mean of its divisors is an integer number (19894693760122).

Almost surely, 2^{39789387520243} is an apocalyptic number.

39789387520243 is a deficient number, since it is larger than the sum of its proper divisors (1).

39789387520243 is an equidigital number, since it uses as much as digits as its factorization.

39789387520243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 548674560, while the sum is 70.

The spelling of 39789387520243 in words is "thirty-nine trillion, seven hundred eighty-nine billion, three hundred eighty-seven million, five hundred twenty thousand, two hundred forty-three".