78471843 has 8 divisors (see below), whose sum is σ = 110136000. Its totient is φ = 49561128.

The previous prime is 78471839. The next prime is 78471851. The reversal of 78471843 is 34817487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78471843 - 2² = 78471839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78471795 and 78471804.

It is not an unprimeable number, because it can be changed into a prime (78471863) 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 7 ways as a sum of consecutive naturals, for example, 688293 + ... + 688406.

It is an arithmetic number, because the mean of its divisors is an integer number (13767000).

Almost surely, 2^78471843 is an apocalyptic number.

78471843 is a deficient number, since it is larger than the sum of its proper divisors (31664157).

78471843 is a wasteful number, since it uses less digits than its factorization.

78471843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376721.

The product of its digits is 150528, while the sum is 42.

The square root of 78471843 is about 8858.4334393842. The cubic root of 78471843 is about 428.1256854945.

It can be divided in two parts, 784 and 71843, that added together give a palindrome (72627).

The spelling of 78471843 in words is "seventy-eight million, four hundred seventy-one thousand, eight hundred forty-three".