80012891 has 16 divisors (see below), whose sum is σ = 95705088. Its totient is φ = 65448000.

The previous prime is 80012887. The next prime is 80012903. The reversal of 80012891 is 19821008.

It is a cyclic number.

It is not a de Polignac number, because 80012891 - 2² = 80012887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80012831) 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, 13316 + ... + 18366.

It is an arithmetic number, because the mean of its divisors is an integer number (5981568).

Almost surely, 2^80012891 is an apocalyptic number.

80012891 is a deficient number, since it is larger than the sum of its proper divisors (15692197).

80012891 is a wasteful number, since it uses less digits than its factorization.

80012891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5162.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 80012891 is about 8944.9925097789. The cubic root of 80012891 is about 430.9100807780.

Adding to 80012891 its reverse (19821008), we get a palindrome (99833899).

The spelling of 80012891 in words is "eighty million, twelve thousand, eight hundred ninety-one".