80723543 has 16 divisors (see below), whose sum is σ = 84341760. Its totient is φ = 77220000.

The previous prime is 80723527. The next prime is 80723561. The reversal of 80723543 is 34532708.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 80723543 - 2⁴ = 80723527 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 (80723563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534518 + ... + 534668.

It is an arithmetic number, because the mean of its divisors is an integer number (5271360).

Almost surely, 2^80723543 is an apocalyptic number.

80723543 is a deficient number, since it is larger than the sum of its proper divisors (3618217).

80723543 is a wasteful number, since it uses less digits than its factorization.

80723543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 80723543 is about 8984.6281503466. The cubic root of 80723543 is about 432.1820631064.

The spelling of 80723543 in words is "eighty million, seven hundred twenty-three thousand, five hundred forty-three".