80871289 has 4 divisors (see below), whose sum is σ = 84387456. Its totient is φ = 77355124.

The previous prime is 80871283. The next prime is 80871293. The reversal of 80871289 is 98217808.

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.

It is a cyclic number.

It is not a de Polignac number, because 80871289 - 2⁵ = 80871257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80871283) 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, 1758049 + ... + 1758094.

It is an arithmetic number, because the mean of its divisors is an integer number (21096864).

Almost surely, 2^80871289 is an apocalyptic number.

It is an amenable number.

80871289 is a deficient number, since it is larger than the sum of its proper divisors (3516167).

80871289 is a wasteful number, since it uses less digits than its factorization.

80871289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516166.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 80871289 is about 8992.8465460053. The cubic root of 80871289 is about 432.4455725778.

The spelling of 80871289 in words is "eighty million, eight hundred seventy-one thousand, two hundred eighty-nine".