13351981399 has 2 divisors, whose sum is σ = 13351981400. Its totient is φ = 13351981398.

The previous prime is 13351981369. The next prime is 13351981439. The reversal of 13351981399 is 99318915331.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13351981399 - 2¹¹ = 13351979351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13351981369) 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, 6675990699 + 6675990700.

It is an arithmetic number, because the mean of its divisors is an integer number (6675990700).

Almost surely, 2^13351981399 is an apocalyptic number.

13351981399 is a deficient number, since it is larger than the sum of its proper divisors (1).

13351981399 is an equidigital number, since it uses as much as digits as its factorization.

13351981399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 52.

The spelling of 13351981399 in words is "thirteen billion, three hundred fifty-one million, nine hundred eighty-one thousand, three hundred ninety-nine".