1112811887 has 4 divisors (see below), whose sum is σ = 1213976616. Its totient is φ = 1011647160.

The previous prime is 1112811883. The next prime is 1112811923. The reversal of 1112811887 is 7881182111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1112811887 - 2² = 1112811883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1112811887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112811883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50582348 + ... + 50582369.

It is an arithmetic number, because the mean of its divisors is an integer number (303494154).

Almost surely, 2^1112811887 is an apocalyptic number.

1112811887 is a deficient number, since it is larger than the sum of its proper divisors (101164729).

1112811887 is a wasteful number, since it uses less digits than its factorization.

1112811887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101164728.

The product of its digits is 7168, while the sum is 38.

The square root of 1112811887 is about 33358.8352164760. The cubic root of 1112811887 is about 1036.2723698501.

Adding to 1112811887 its reverse (7881182111), we get a palindrome (8993993998).

The spelling of 1112811887 in words is "one billion, one hundred twelve million, eight hundred eleven thousand, eight hundred eighty-seven".