111988684859 has 2 divisors, whose sum is σ = 111988684860. Its totient is φ = 111988684858.

The previous prime is 111988684783. The next prime is 111988684897. The reversal of 111988684859 is 958486889111.

It is a strong prime.

It is an emirp because it is prime and its reverse (958486889111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111988684859 - 2³⁶ = 43269208123 is a prime.

It is not a weakly prime, because it can be changed into another prime (111988684259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55994342429 + 55994342430.

It is an arithmetic number, because the mean of its divisors is an integer number (55994342430).

Almost surely, 2^111988684859 is an apocalyptic number.

111988684859 is a deficient number, since it is larger than the sum of its proper divisors (1).

111988684859 is an equidigital number, since it uses as much as digits as its factorization.

111988684859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39813120, while the sum is 68.

The spelling of 111988684859 in words is "one hundred eleven billion, nine hundred eighty-eight million, six hundred eighty-four thousand, eight hundred fifty-nine".