11111687 has 2 divisors, whose sum is σ = 11111688. Its totient is φ = 11111686.

The previous prime is 11111677. The next prime is 11111701. The reversal of 11111687 is 78611111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111687 - 2⁶ = 11111623 is a prime.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111677) 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, 5555843 + 5555844.

It is an arithmetic number, because the mean of its divisors is an integer number (5555844).

Almost surely, 2^11111687 is an apocalyptic number.

11111687 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111687 is an equidigital number, since it uses as much as digits as its factorization.

11111687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 26.

The square root of 11111687 is about 3333.4197155474. The cubic root of 11111687 is about 223.1481718174.

Adding to 11111687 its reverse (78611111), we get a palindrome (89722798).

The spelling of 11111687 in words is "eleven million, one hundred eleven thousand, six hundred eighty-seven".