13981797593 has 2 divisors, whose sum is σ = 13981797594. Its totient is φ = 13981797592.

The previous prime is 13981797581. The next prime is 13981797601. The reversal of 13981797593 is 39579718931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7660275529 + 6321522064 = 87523^2 + 79508^2 .

It is a cyclic number.

It is not a de Polignac number, because 13981797593 - 2³² = 9686830297 is a prime.

It is not a weakly prime, because it can be changed into another prime (13981797793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6990898796 + 6990898797.

It is an arithmetic number, because the mean of its divisors is an integer number (6990898797).

Almost surely, 2^13981797593 is an apocalyptic number.

It is an amenable number.

13981797593 is a deficient number, since it is larger than the sum of its proper divisors (1).

13981797593 is an equidigital number, since it uses as much as digits as its factorization.

13981797593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12859560, while the sum is 62.

The spelling of 13981797593 in words is "thirteen billion, nine hundred eighty-one million, seven hundred ninety-seven thousand, five hundred ninety-three".