80995871 has 16 divisors (see below), whose sum is σ = 94112928. Its totient is φ = 68889600.

The previous prime is 80995867. The next prime is 80995883. The reversal of 80995871 is 17859908.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 80995871 - 2² = 80995867 is a prime.

It is a super-2 number, since 2×80995871² = 13120662238097282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80995891) 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, 32651 + ... + 35043.

It is an arithmetic number, because the mean of its divisors is an integer number (5882058).

Almost surely, 2^80995871 is an apocalyptic number.

80995871 is a deficient number, since it is larger than the sum of its proper divisors (13117057).

80995871 is a wasteful number, since it uses less digits than its factorization.

80995871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 80995871 is about 8999.7706081877. The cubic root of 80995871 is about 432.6675190556.

The spelling of 80995871 in words is "eighty million, nine hundred ninety-five thousand, eight hundred seventy-one".