39387981686341 has 2 divisors, whose sum is σ = 39387981686342. Its totient is φ = 39387981686340.

The previous prime is 39387981686327. The next prime is 39387981686483. The reversal of 39387981686341 is 14368618978393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31455788234116 + 7932193452225 = 5608546^2 + 2816415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39387981686341 is a prime.

It is a super-2 number, since 2×39387981686341² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39387981186341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19693990843170 + 19693990843171.

It is an arithmetic number, because the mean of its divisors is an integer number (19693990843171).

Almost surely, 2^{39387981686341} is an apocalyptic number.

It is an amenable number.

39387981686341 is a deficient number, since it is larger than the sum of its proper divisors (1).

39387981686341 is an equidigital number, since it uses as much as digits as its factorization.

39387981686341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128701952, while the sum is 76.

The spelling of 39387981686341 in words is "thirty-nine trillion, three hundred eighty-seven billion, nine hundred eighty-one million, six hundred eighty-six thousand, three hundred forty-one".