7775879 has 2 divisors, whose sum is σ = 7775880. Its totient is φ = 7775878.

The previous prime is 7775861. The next prime is 7775881. The reversal of 7775879 is 9785777.

It is a strong prime.

It is an emirp because it is prime and its reverse (9785777) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7775879 - 2⁸ = 7775623 is a prime.

It is a Sophie Germain prime.

Together with 7775881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7775179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3887939 + 3887940.

It is an arithmetic number, because the mean of its divisors is an integer number (3887940).

Almost surely, 2^7775879 is an apocalyptic number.

7775879 is a deficient number, since it is larger than the sum of its proper divisors (1).

7775879 is an equidigital number, since it uses as much as digits as its factorization.

7775879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864360, while the sum is 50.

The square root of 7775879 is about 2788.5263133060. The cubic root of 7775879 is about 198.1146073224.

The spelling of 7775879 in words is "seven million, seven hundred seventy-five thousand, eight hundred seventy-nine".