13821787523 has 2 divisors, whose sum is σ = 13821787524. Its totient is φ = 13821787522.

The previous prime is 13821787493. The next prime is 13821787531. The reversal of 13821787523 is 32578712831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13821787523 - 2²⁶ = 13754678659 is a prime.

It is not a weakly prime, because it can be changed into another prime (13821787583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6910893761 + 6910893762.

It is an arithmetic number, because the mean of its divisors is an integer number (6910893762).

Almost surely, 2^13821787523 is an apocalyptic number.

13821787523 is a deficient number, since it is larger than the sum of its proper divisors (1).

13821787523 is an equidigital number, since it uses as much as digits as its factorization.

13821787523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 47.

The spelling of 13821787523 in words is "thirteen billion, eight hundred twenty-one million, seven hundred eighty-seven thousand, five hundred twenty-three".