118168643 has 4 divisors (see below), whose sum is σ = 118893768. Its totient is φ = 117443520.

The previous prime is 118168613. The next prime is 118168663. The reversal of 118168643 is 346861811.

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 118168643 - 2⁶ = 118168579 is a prime.

It is a super-2 number, since 2×118168643² = 27927656376922898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118168597 and 118168606.

It is not an unprimeable number, because it can be changed into a prime (118168613) 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, 362318 + ... + 362643.

It is an arithmetic number, because the mean of its divisors is an integer number (29723442).

Almost surely, 2^118168643 is an apocalyptic number.

118168643 is a deficient number, since it is larger than the sum of its proper divisors (725125).

118168643 is an equidigital number, since it uses as much as digits as its factorization.

118168643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725124.

The product of its digits is 27648, while the sum is 38.

The square root of 118168643 is about 10870.5401429736. The cubic root of 118168643 is about 490.7203662401.

It can be divided in two parts, 118168 and 643, that added together give a palindrome (118811).

The spelling of 118168643 in words is "one hundred eighteen million, one hundred sixty-eight thousand, six hundred forty-three".