80872171 has 2 divisors, whose sum is σ = 80872172. Its totient is φ = 80872170.

The previous prime is 80872159. The next prime is 80872177. The reversal of 80872171 is 17127808.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80872171 - 2⁵ = 80872139 is a prime.

It is not a weakly prime, because it can be changed into another prime (80872177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40436085 + 40436086.

It is an arithmetic number, because the mean of its divisors is an integer number (40436086).

Almost surely, 2^80872171 is an apocalyptic number.

80872171 is a deficient number, since it is larger than the sum of its proper divisors (1).

80872171 is an equidigital number, since it uses as much as digits as its factorization.

80872171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 80872171 is about 8992.8955848492. The cubic root of 80872171 is about 432.4471446875.

Adding to 80872171 its reverse (17127808), we get a palindrome (97999979).

The spelling of 80872171 in words is "eighty million, eight hundred seventy-two thousand, one hundred seventy-one".