80717863 has 2 divisors, whose sum is σ = 80717864. Its totient is φ = 80717862.

The previous prime is 80717849. The next prime is 80717867. The reversal of 80717863 is 36871708.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80717863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80717867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40358931 + 40358932.

It is an arithmetic number, because the mean of its divisors is an integer number (40358932).

Almost surely, 2^80717863 is an apocalyptic number.

80717863 is a deficient number, since it is larger than the sum of its proper divisors (1).

80717863 is an equidigital number, since it uses as much as digits as its factorization.

80717863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 80717863 is about 8984.3120493447. The cubic root of 80717863 is about 432.1719262384.

The spelling of 80717863 in words is "eighty million, seven hundred seventeen thousand, eight hundred sixty-three".