111664489 has 4 divisors (see below), whose sum is σ = 112770180. Its totient is φ = 110558800.

The previous prime is 111664477. The next prime is 111664493. The reversal of 111664489 is 984466111.

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 44997264 + 66667225 = 6708^2 + 8165^2 .

It is a cyclic number.

It is not a de Polignac number, because 111664489 - 2²³ = 103275881 is a prime.

It is a super-2 number, since 2×111664489² = 24937916207262242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111664429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552694 + ... + 552895.

It is an arithmetic number, because the mean of its divisors is an integer number (28192545).

Almost surely, 2^111664489 is an apocalyptic number.

It is an amenable number.

111664489 is a deficient number, since it is larger than the sum of its proper divisors (1105691).

111664489 is a wasteful number, since it uses less digits than its factorization.

111664489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105690.

The product of its digits is 41472, while the sum is 40.

The square root of 111664489 is about 10567.1419504046. The cubic root of 111664489 is about 481.5466444779.

The spelling of 111664489 in words is "one hundred eleven million, six hundred sixty-four thousand, four hundred eighty-nine".