39980686387 has 2 divisors, whose sum is σ = 39980686388. Its totient is φ = 39980686386.

The previous prime is 39980686379. The next prime is 39980686393. The reversal of 39980686387 is 78368608993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39980686387 - 2³ = 39980686379 is a prime.

It is a super-2 number, since 2×39980686387² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39980686337) 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, 19990343193 + 19990343194.

It is an arithmetic number, because the mean of its divisors is an integer number (19990343194).

Almost surely, 2^39980686387 is an apocalyptic number.

39980686387 is a deficient number, since it is larger than the sum of its proper divisors (1).

39980686387 is an equidigital number, since it uses as much as digits as its factorization.

39980686387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94058496, while the sum is 67.

The spelling of 39980686387 in words is "thirty-nine billion, nine hundred eighty million, six hundred eighty-six thousand, three hundred eighty-seven".