71078543 has 4 divisors (see below), whose sum is σ = 72812208. Its totient is φ = 69344880.

The previous prime is 71078537. The next prime is 71078551. The reversal of 71078543 is 34587017.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71078543 - 2²⁴ = 54301327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71078143) 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 3 ways as a sum of consecutive naturals, for example, 866771 + ... + 866852.

It is an arithmetic number, because the mean of its divisors is an integer number (18203052).

Almost surely, 2^71078543 is an apocalyptic number.

71078543 is a deficient number, since it is larger than the sum of its proper divisors (1733665).

71078543 is a wasteful number, since it uses less digits than its factorization.

71078543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733664.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 71078543 is about 8430.8091545237. The cubic root of 71078543 is about 414.2344098690.

The spelling of 71078543 in words is "seventy-one million, seventy-eight thousand, five hundred forty-three".