39391000069 has 2 divisors, whose sum is σ = 39391000070. Its totient is φ = 39391000068.

The previous prime is 39391000031. The next prime is 39391000081. The reversal of 39391000069 is 96000019393.

39391000069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26727999169 + 12663000900 = 163487^2 + 112530^2 .

It is an emirp because it is prime and its reverse (96000019393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39391000069 - 2⁷ = 39390999941 is a prime.

It is a super-2 number, since 2×39391000069² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39390999995 and 39391000040.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39391000769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19695500034 + 19695500035.

It is an arithmetic number, because the mean of its divisors is an integer number (19695500035).

Almost surely, 2^39391000069 is an apocalyptic number.

It is an amenable number.

39391000069 is a deficient number, since it is larger than the sum of its proper divisors (1).

39391000069 is an equidigital number, since it uses as much as digits as its factorization.

39391000069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 40.

The spelling of 39391000069 in words is "thirty-nine billion, three hundred ninety-one million, sixty-nine", and thus it is an aban number.