78413843 has 4 divisors (see below), whose sum is σ = 83026440. Its totient is φ = 73801248.

The previous prime is 78413833. The next prime is 78413851. The reversal of 78413843 is 34831487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34831487 = 17 ⋅2048911.

It is a cyclic number.

It is not a de Polignac number, because 78413843 - 2⁴ = 78413827 is a prime.

It is a super-2 number, since 2×78413843² = 12297461548057298, 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 = 78413797 and 78413806.

It is not an unprimeable number, because it can be changed into a prime (78413833) 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, 2306273 + ... + 2306306.

It is an arithmetic number, because the mean of its divisors is an integer number (20756610).

Almost surely, 2^78413843 is an apocalyptic number.

78413843 is a deficient number, since it is larger than the sum of its proper divisors (4612597).

78413843 is a wasteful number, since it uses less digits than its factorization.

78413843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612596.

The product of its digits is 64512, while the sum is 38.

The square root of 78413843 is about 8855.1591177121. The cubic root of 78413843 is about 428.0201809420.

The spelling of 78413843 in words is "seventy-eight million, four hundred thirteen thousand, eight hundred forty-three".