7966889 has 4 divisors (see below), whose sum is σ = 9105024. Its totient is φ = 6828756.

The previous prime is 7966879. The next prime is 7966927. The reversal of 7966889 is 9886697.

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 7966889 - 2⁴ = 7966873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7966889.

It is not an unprimeable number, because it can be changed into a prime (7966879) 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, 569057 + ... + 569070.

It is an arithmetic number, because the mean of its divisors is an integer number (2276256).

Almost surely, 2^7966889 is an apocalyptic number.

It is an amenable number.

7966889 is a deficient number, since it is larger than the sum of its proper divisors (1138135).

7966889 is a wasteful number, since it uses less digits than its factorization.

7966889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138134.

The product of its digits is 1306368, while the sum is 53.

The square root of 7966889 is about 2822.5678025514. The cubic root of 7966889 is about 199.7236934492.

It can be divided in two parts, 796688 and 9, that added together give a palindrome (796697).

The spelling of 7966889 in words is "seven million, nine hundred sixty-six thousand, eight hundred eighty-nine".