13117787 has 2 divisors, whose sum is σ = 13117788. Its totient is φ = 13117786.

The previous prime is 13117781. The next prime is 13117801. The reversal of 13117787 is 78771131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13117787 - 2⁶ = 13117723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13117781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6558893 + 6558894.

It is an arithmetic number, because the mean of its divisors is an integer number (6558894).

Almost surely, 2^13117787 is an apocalyptic number.

13117787 is a deficient number, since it is larger than the sum of its proper divisors (1).

13117787 is an equidigital number, since it uses as much as digits as its factorization.

13117787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8232, while the sum is 35.

The square root of 13117787 is about 3621.8485611632. The cubic root of 13117787 is about 235.8414800162.

The spelling of 13117787 in words is "thirteen million, one hundred seventeen thousand, seven hundred eighty-seven".