78485843 has 4 divisors (see below), whose sum is σ = 80607120. Its totient is φ = 76364568.

The previous prime is 78485839. The next prime is 78485909. The reversal of 78485843 is 34858487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34858487 = 41 ⋅850207.

It is a cyclic number.

It is not a de Polignac number, because 78485843 - 2² = 78485839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78485443) 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, 1060583 + ... + 1060656.

It is an arithmetic number, because the mean of its divisors is an integer number (20151780).

Almost surely, 2^78485843 is an apocalyptic number.

78485843 is a deficient number, since it is larger than the sum of its proper divisors (2121277).

78485843 is a wasteful number, since it uses less digits than its factorization.

78485843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121276.

The product of its digits is 860160, while the sum is 47.

The square root of 78485843 is about 8859.2236115813. The cubic root of 78485843 is about 428.1511443213.

The spelling of 78485843 in words is "seventy-eight million, four hundred eighty-five thousand, eight hundred forty-three".