39935047069 has 2 divisors, whose sum is σ = 39935047070. Its totient is φ = 39935047068.

The previous prime is 39935047067. The next prime is 39935047109. The reversal of 39935047069 is 96074053993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39842156025 + 92891044 = 199605^2 + 9638^2 .

It is a cyclic number.

It is not a de Polignac number, because 39935047069 - 2¹ = 39935047067 is a prime.

It is a super-2 number, since 2×39935047069² (a number of 22 digits) contains 22 as substring.

Together with 39935047067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39935047067) 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, 19967523534 + 19967523535.

It is an arithmetic number, because the mean of its divisors is an integer number (19967523535).

Almost surely, 2^39935047069 is an apocalyptic number.

It is an amenable number.

39935047069 is a deficient number, since it is larger than the sum of its proper divisors (1).

39935047069 is an equidigital number, since it uses as much as digits as its factorization.

39935047069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5511240, while the sum is 55.

The spelling of 39935047069 in words is "thirty-nine billion, nine hundred thirty-five million, forty-seven thousand, sixty-nine".