111711387 has 8 divisors (see below), whose sum is σ = 149343040. Its totient is φ = 74277000.

The previous prime is 111711373. The next prime is 111711401. The reversal of 111711387 is 783117111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111711373) and next prime (111711401).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111711387 - 2¹⁸ = 111449243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111711337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47989 + ... + 50262.

It is an arithmetic number, because the mean of its divisors is an integer number (18667880).

Almost surely, 2^111711387 is an apocalyptic number.

111711387 is a deficient number, since it is larger than the sum of its proper divisors (37631653).

111711387 is an equidigital number, since it uses as much as digits as its factorization.

111711387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98633.

The product of its digits is 1176, while the sum is 30.

The square root of 111711387 is about 10569.3607659120. The cubic root of 111711387 is about 481.6140500122.

Adding to 111711387 its reverse (783117111), we get a palindrome (894828498).

The spelling of 111711387 in words is "one hundred eleven million, seven hundred eleven thousand, three hundred eighty-seven".