78747543 has 24 divisors (see below), whose sum is σ = 130884000. Its totient is φ = 44691264.

The previous prime is 78747527. The next prime is 78747547. The reversal of 78747543 is 34574787.

It is not a de Polignac number, because 78747543 - 2⁴ = 78747527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78747547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5193 + ... + 13581.

It is an arithmetic number, because the mean of its divisors is an integer number (5453500).

Almost surely, 2^78747543 is an apocalyptic number.

78747543 is a deficient number, since it is larger than the sum of its proper divisors (52136457).

78747543 is a wasteful number, since it uses less digits than its factorization.

78747543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8551 (or 8548 counting only the distinct ones).

The product of its digits is 658560, while the sum is 45.

The square root of 78747543 is about 8873.9812373027. The cubic root of 78747543 is about 428.6264863075.

The spelling of 78747543 in words is "seventy-eight million, seven hundred forty-seven thousand, five hundred forty-three".