80878543 has 2 divisors, whose sum is σ = 80878544. Its totient is φ = 80878542.

The previous prime is 80878531. The next prime is 80878561. The reversal of 80878543 is 34587808.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80878543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80878543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80878043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40439271 + 40439272.

It is an arithmetic number, because the mean of its divisors is an integer number (40439272).

Almost surely, 2^80878543 is an apocalyptic number.

80878543 is a deficient number, since it is larger than the sum of its proper divisors (1).

80878543 is an equidigital number, since it uses as much as digits as its factorization.

80878543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 80878543 is about 8993.2498575320. The cubic root of 80878543 is about 432.4585020382.

The spelling of 80878543 in words is "eighty million, eight hundred seventy-eight thousand, five hundred forty-three".