118416643 has 4 divisors (see below), whose sum is σ = 118570608. Its totient is φ = 118262680.

The previous prime is 118416637. The next prime is 118416647. The reversal of 118416643 is 346614811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346614811 = 2521 ⋅137491.

It is a cyclic number.

It is not a de Polignac number, because 118416643 - 2¹⁷ = 118285571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118416599 and 118416608.

It is not an unprimeable number, because it can be changed into a prime (118416647) 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, 75823 + ... + 77368.

It is an arithmetic number, because the mean of its divisors is an integer number (29642652).

Almost surely, 2^118416643 is an apocalyptic number.

118416643 is a deficient number, since it is larger than the sum of its proper divisors (153965).

118416643 is an equidigital number, since it uses as much as digits as its factorization.

118416643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153964.

The product of its digits is 13824, while the sum is 34.

The square root of 118416643 is about 10881.9411411751. The cubic root of 118416643 is about 491.0634172411.

The spelling of 118416643 in words is "one hundred eighteen million, four hundred sixteen thousand, six hundred forty-three".