7911689 has 2 divisors, whose sum is σ = 7911690. Its totient is φ = 7911688.

The previous prime is 7911679. The next prime is 7911713. The reversal of 7911689 is 9861197.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5929225 + 1982464 = 2435^2 + 1408^2 .

It is a cyclic number.

It is not a de Polignac number, because 7911689 - 2⁸ = 7911433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7911679) 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 as a sum of consecutive naturals, namely, 3955844 + 3955845.

It is an arithmetic number, because the mean of its divisors is an integer number (3955845).

Almost surely, 2^7911689 is an apocalyptic number.

It is an amenable number.

7911689 is a deficient number, since it is larger than the sum of its proper divisors (1).

7911689 is an equidigital number, since it uses as much as digits as its factorization.

7911689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 41.

The square root of 7911689 is about 2812.7724756901. The cubic root of 7911689 is about 199.2613503418.

The spelling of 7911689 in words is "seven million, nine hundred eleven thousand, six hundred eighty-nine".