111387917 has 4 divisors (see below), whose sum is σ = 111409056. Its totient is φ = 111366780.

The previous prime is 111387911. The next prime is 111387967. The reversal of 111387917 is 719783111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 111387917 - 2⁴ = 111387901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111387911) 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 3 ways as a sum of consecutive naturals, for example, 4442 + ... + 15572.

It is an arithmetic number, because the mean of its divisors is an integer number (27852264).

Almost surely, 2^111387917 is an apocalyptic number.

It is an amenable number.

111387917 is a deficient number, since it is larger than the sum of its proper divisors (21139).

111387917 is a wasteful number, since it uses less digits than its factorization.

111387917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21138.

The product of its digits is 10584, while the sum is 38.

The square root of 111387917 is about 10554.0474226716. The cubic root of 111387917 is about 481.1487488795.

The spelling of 111387917 in words is "one hundred eleven million, three hundred eighty-seven thousand, nine hundred seventeen".