13793973581 has 2 divisors, whose sum is σ = 13793973582. Its totient is φ = 13793973580.

The previous prime is 13793973577. The next prime is 13793973629. The reversal of 13793973581 is 18537939731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13744045225 + 49928356 = 117235^2 + 7066^2 .

It is a cyclic number.

It is not a de Polignac number, because 13793973581 - 2² = 13793973577 is a prime.

It is a super-2 number, since 2×13793973581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13793973541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6896986790 + 6896986791.

It is an arithmetic number, because the mean of its divisors is an integer number (6896986791).

Almost surely, 2^13793973581 is an apocalyptic number.

It is an amenable number.

13793973581 is a deficient number, since it is larger than the sum of its proper divisors (1).

13793973581 is an equidigital number, since it uses as much as digits as its factorization.

13793973581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 56.

The spelling of 13793973581 in words is "thirteen billion, seven hundred ninety-three million, nine hundred seventy-three thousand, five hundred eighty-one".