13908328081 has 2 divisors, whose sum is σ = 13908328082. Its totient is φ = 13908328080.

The previous prime is 13908328079. The next prime is 13908328097. The reversal of 13908328081 is 18082380931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11615450625 + 2292877456 = 107775^2 + 47884^2 .

It is a cyclic number.

It is not a de Polignac number, because 13908328081 - 2¹ = 13908328079 is a prime.

It is a super-2 number, since 2×13908328081² (a number of 21 digits) contains 22 as substring.

Together with 13908328079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13908328381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6954164040 + 6954164041.

It is an arithmetic number, because the mean of its divisors is an integer number (6954164041).

Almost surely, 2^13908328081 is an apocalyptic number.

It is an amenable number.

13908328081 is a deficient number, since it is larger than the sum of its proper divisors (1).

13908328081 is an equidigital number, since it uses as much as digits as its factorization.

13908328081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 13908328081 in words is "thirteen billion, nine hundred eight million, three hundred twenty-eight thousand, eighty-one".