80827081 has 4 divisors (see below), whose sum is σ = 80845072. Its totient is φ = 80809092.

The previous prime is 80827073. The next prime is 80827099. The reversal of 80827081 is 18072808.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 80827081 - 2³ = 80827073 is a prime.

It is a super-2 number, since 2×80827081² = 13066034045961122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80827781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4066 + ... + 13348.

It is an arithmetic number, because the mean of its divisors is an integer number (20211268).

Almost surely, 2^80827081 is an apocalyptic number.

It is an amenable number.

80827081 is a deficient number, since it is larger than the sum of its proper divisors (17991).

80827081 is an equidigital number, since it uses as much as digits as its factorization.

80827081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17990.

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 80827081 is about 8990.3882563547. The cubic root of 80827081 is about 432.3667599416.

Adding to 80827081 its reverse (18072808), we get a palindrome (98899889).

It can be divided in two parts, 808 and 27081, that added together give a square (27889 = 167²).

The spelling of 80827081 in words is "eighty million, eight hundred twenty-seven thousand, eighty-one".