80871771 has 16 divisors (see below), whose sum is σ = 120182400. Its totient is φ = 48071808.

The previous prime is 80871767. The next prime is 80871773. The reversal of 80871771 is 17717808.

It is not a de Polignac number, because 80871771 - 2² = 80871767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80871773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40761 + ... + 42698.

It is an arithmetic number, because the mean of its divisors is an integer number (7511400).

Almost surely, 2^80871771 is an apocalyptic number.

80871771 is a deficient number, since it is larger than the sum of its proper divisors (39310629).

80871771 is a wasteful number, since it uses less digits than its factorization.

80871771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83498.

The product of its (nonzero) digits is 21952, while the sum is 39.

The square root of 80871771 is about 8992.8733450438. The cubic root of 80871771 is about 432.4464317140.

The spelling of 80871771 in words is "eighty million, eight hundred seventy-one thousand, seven hundred seventy-one".