78684543 has 48 divisors (see below), whose sum is σ = 134784000. Its totient is φ = 44205840.

The previous prime is 78684527. The next prime is 78684563. The reversal of 78684543 is 34548687.

It is not a de Polignac number, because 78684543 - 2⁴ = 78684527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78684563) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 218998 + ... + 219356.

It is an arithmetic number, because the mean of its divisors is an integer number (2808000).

Almost surely, 2^78684543 is an apocalyptic number.

78684543 is a deficient number, since it is larger than the sum of its proper divisors (56099457).

78684543 is a wasteful number, since it uses less digits than its factorization.

78684543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 440 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 78684543 is about 8870.4308238101. The cubic root of 78684543 is about 428.5121518493.

The spelling of 78684543 in words is "seventy-eight million, six hundred eighty-four thousand, five hundred forty-three".