13351981393 has 4 divisors (see below), whose sum is σ = 13425749428. Its totient is φ = 13278213360.

The previous prime is 13351981369. The next prime is 13351981399. The reversal of 13351981393 is 39318915331.

13351981393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1144604224 + 12207377169 = 33832^2 + 110487^2 .

It is a cyclic number.

It is not a de Polignac number, because 13351981393 - 2²¹ = 13349884241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13351981399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36883746 + ... + 36884107.

It is an arithmetic number, because the mean of its divisors is an integer number (3356437357).

Almost surely, 2^13351981393 is an apocalyptic number.

It is an amenable number.

13351981393 is a deficient number, since it is larger than the sum of its proper divisors (73768035).

13351981393 is an equidigital number, since it uses as much as digits as its factorization.

13351981393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73768034.

The product of its digits is 262440, while the sum is 46.

The spelling of 13351981393 in words is "thirteen billion, three hundred fifty-one million, nine hundred eighty-one thousand, three hundred ninety-three".