13707206581 has 2 divisors, whose sum is σ = 13707206582. Its totient is φ = 13707206580.

The previous prime is 13707206549. The next prime is 13707206587. The reversal of 13707206581 is 18560270731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13587632356 + 119574225 = 116566^2 + 10935^2 .

It is an emirp because it is prime and its reverse (18560270731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13707206581 - 2⁵ = 13707206549 is a prime.

It is a super-3 number, since 3×13707206581³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13707206587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6853603290 + 6853603291.

It is an arithmetic number, because the mean of its divisors is an integer number (6853603291).

Almost surely, 2^13707206581 is an apocalyptic number.

It is an amenable number.

13707206581 is a deficient number, since it is larger than the sum of its proper divisors (1).

13707206581 is an equidigital number, since it uses as much as digits as its factorization.

13707206581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 13707206581 in words is "thirteen billion, seven hundred seven million, two hundred six thousand, five hundred eighty-one".