111906427 has 4 divisors (see below), whose sum is σ = 118489176. Its totient is φ = 105323680.

The previous prime is 111906413. The next prime is 111906439. The reversal of 111906427 is 724609111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724609111 = 7963 ⋅90997.

It is a cyclic number.

It is not a de Polignac number, because 111906427 - 2²³ = 103517819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111906467) 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, 3291349 + ... + 3291382.

It is an arithmetic number, because the mean of its divisors is an integer number (29622294).

Almost surely, 2^111906427 is an apocalyptic number.

111906427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

111906427 is a deficient number, since it is larger than the sum of its proper divisors (6582749).

111906427 is an equidigital number, since it uses as much as digits as its factorization.

111906427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6582748.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 111906427 is about 10578.5834117806. The cubic root of 111906427 is about 481.8941748126.

The spelling of 111906427 in words is "one hundred eleven million, nine hundred six thousand, four hundred twenty-seven".