13345681387 has 2 divisors, whose sum is σ = 13345681388. Its totient is φ = 13345681386.

The previous prime is 13345681337. The next prime is 13345681397. The reversal of 13345681387 is 78318654331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13345681387 - 2⁷ = 13345681259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13345681387.

It is not a weakly prime, because it can be changed into another prime (13345681337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6672840693 + 6672840694.

It is an arithmetic number, because the mean of its divisors is an integer number (6672840694).

Almost surely, 2^13345681387 is an apocalyptic number.

13345681387 is a deficient number, since it is larger than the sum of its proper divisors (1).

13345681387 is an equidigital number, since it uses as much as digits as its factorization.

13345681387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 49.

The spelling of 13345681387 in words is "thirteen billion, three hundred forty-five million, six hundred eighty-one thousand, three hundred eighty-seven".