39893426717 has 2 divisors, whose sum is σ = 39893426718. Its totient is φ = 39893426716.

The previous prime is 39893426647. The next prime is 39893426743. The reversal of 39893426717 is 71762439893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35161500196 + 4731926521 = 187514^2 + 68789^2 .

It is a cyclic number.

It is not a de Polignac number, because 39893426717 - 2¹⁶ = 39893361181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39893426747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19946713358 + 19946713359.

It is an arithmetic number, because the mean of its divisors is an integer number (19946713359).

Almost surely, 2^39893426717 is an apocalyptic number.

It is an amenable number.

39893426717 is a deficient number, since it is larger than the sum of its proper divisors (1).

39893426717 is an equidigital number, since it uses as much as digits as its factorization.

39893426717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 59.

The spelling of 39893426717 in words is "thirty-nine billion, eight hundred ninety-three million, four hundred twenty-six thousand, seven hundred seventeen".