111687449 has 4 divisors (see below), whose sum is σ = 112838964. Its totient is φ = 110535936.

The previous prime is 111687431. The next prime is 111687461. The reversal of 111687449 is 944786111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 81360400 + 30327049 = 9020^2 + 5507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111687449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111687409) 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, 575612 + ... + 575805.

It is an arithmetic number, because the mean of its divisors is an integer number (28209741).

Almost surely, 2^111687449 is an apocalyptic number.

It is an amenable number.

111687449 is a deficient number, since it is larger than the sum of its proper divisors (1151515).

111687449 is an equidigital number, since it uses as much as digits as its factorization.

111687449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151514.

The product of its digits is 48384, while the sum is 41.

The square root of 111687449 is about 10568.2282810318. The cubic root of 111687449 is about 481.5796467730.

The spelling of 111687449 in words is "one hundred eleven million, six hundred eighty-seven thousand, four hundred forty-nine".