39947356753907 has 2 divisors, whose sum is σ = 39947356753908. Its totient is φ = 39947356753906.

The previous prime is 39947356753879. The next prime is 39947356753937. The reversal of 39947356753907 is 70935765374993.

It is a weak prime.

It is an emirp because it is prime and its reverse (70935765374993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39947356753907 - 2¹⁴ = 39947356737523 is a prime.

It is not a weakly prime, because it can be changed into another prime (39947356753937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19973678376953 + 19973678376954.

It is an arithmetic number, because the mean of its divisors is an integer number (19973678376954).

Almost surely, 2^{39947356753907} is an apocalyptic number.

39947356753907 is a deficient number, since it is larger than the sum of its proper divisors (1).

39947356753907 is an equidigital number, since it uses as much as digits as its factorization.

39947356753907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050761400, while the sum is 77.

The spelling of 39947356753907 in words is "thirty-nine trillion, nine hundred forty-seven billion, three hundred fifty-six million, seven hundred fifty-three thousand, nine hundred seven".