103918643 has 4 divisors (see below), whose sum is σ = 103956168. Its totient is φ = 103881120.

The previous prime is 103918631. The next prime is 103918649. The reversal of 103918643 is 346819301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346819301 = 4231 ⋅81971.

It is a cyclic number.

It is not a de Polignac number, because 103918643 - 2¹⁴ = 103902259 is a prime.

It is a super-2 number, since 2×103918643² = 21598168725922898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103918649) 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, 14246 + ... + 20267.

It is an arithmetic number, because the mean of its divisors is an integer number (25989042).

Almost surely, 2^103918643 is an apocalyptic number.

103918643 is a deficient number, since it is larger than the sum of its proper divisors (37525).

103918643 is an equidigital number, since it uses as much as digits as its factorization.

103918643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37524.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 103918643 is about 10194.0493916794. The cubic root of 103918643 is about 470.1442789284.

The spelling of 103918643 in words is "one hundred three million, nine hundred eighteen thousand, six hundred forty-three".