13338894389 has 2 divisors, whose sum is σ = 13338894390. Its totient is φ = 13338894388.

The previous prime is 13338894337. The next prime is 13338894407. The reversal of 13338894389 is 98349883331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12736928164 + 601966225 = 112858^2 + 24535^2 .

It is a cyclic number.

It is not a de Polignac number, because 13338894389 - 2⁸ = 13338894133 is a prime.

It is a super-2 number, since 2×13338894389² (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 (13338894329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6669447194 + 6669447195.

It is an arithmetic number, because the mean of its divisors is an integer number (6669447195).

Almost surely, 2^13338894389 is an apocalyptic number.

It is an amenable number.

13338894389 is a deficient number, since it is larger than the sum of its proper divisors (1).

13338894389 is an equidigital number, since it uses as much as digits as its factorization.

13338894389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13436928, while the sum is 59.

The spelling of 13338894389 in words is "thirteen billion, three hundred thirty-eight million, eight hundred ninety-four thousand, three hundred eighty-nine".