7871089 has 4 divisors (see below), whose sum is σ = 7882480. Its totient is φ = 7859700.

The previous prime is 7871081. The next prime is 7871113. The reversal of 7871089 is 9801787.

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 an emirpimes, since its reverse is a distinct semiprime: 9801787 = 311 ⋅31517.

It is a cyclic number.

It is not a de Polignac number, because 7871089 - 2³ = 7871081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7871081) 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 3 ways as a sum of consecutive naturals, for example, 4587 + ... + 6064.

It is an arithmetic number, because the mean of its divisors is an integer number (1970620).

Almost surely, 2^7871089 is an apocalyptic number.

It is an amenable number.

7871089 is a deficient number, since it is larger than the sum of its proper divisors (11391).

7871089 is a wasteful number, since it uses less digits than its factorization.

7871089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11390.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 7871089 is about 2805.5461143956. The cubic root of 7871089 is about 198.9199192950.

The spelling of 7871089 in words is "seven million, eight hundred seventy-one thousand, eighty-nine".