13187887469 has 2 divisors, whose sum is σ = 13187887470. Its totient is φ = 13187887468.

The previous prime is 13187887459. The next prime is 13187887481. The reversal of 13187887469 is 96478878131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13147374244 + 40513225 = 114662^2 + 6365^2 .

It is an emirp because it is prime and its reverse (96478878131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13187887469 is a prime.

It is a super-2 number, since 2×13187887469² (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 (13187887429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6593943734 + 6593943735.

It is an arithmetic number, because the mean of its divisors is an integer number (6593943735).

Almost surely, 2^13187887469 is an apocalyptic number.

It is an amenable number.

13187887469 is a deficient number, since it is larger than the sum of its proper divisors (1).

13187887469 is an equidigital number, since it uses as much as digits as its factorization.

13187887469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 62.

The spelling of 13187887469 in words is "thirteen billion, one hundred eighty-seven million, eight hundred eighty-seven thousand, four hundred sixty-nine".