7879811 has 4 divisors (see below), whose sum is σ = 7885632. Its totient is φ = 7873992.

The previous prime is 7879799. The next prime is 7879841. The reversal of 7879811 is 1189787.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1189787 = 269 ⋅4423.

It is a cyclic number.

It is not a de Polignac number, because 7879811 - 2⁶ = 7879747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7879841) 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, 305 + ... + 3981.

It is an arithmetic number, because the mean of its divisors is an integer number (1971408).

Almost surely, 2^7879811 is an apocalyptic number.

7879811 is a deficient number, since it is larger than the sum of its proper divisors (5821).

7879811 is a wasteful number, since it uses less digits than its factorization.

7879811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5820.

The product of its digits is 28224, while the sum is 41.

The square root of 7879811 is about 2807.1001050907. The cubic root of 7879811 is about 198.9933669498.

Subtracting from 7879811 its product of digits (28224), we obtain a palindrome (7851587).

The spelling of 7879811 in words is "seven million, eight hundred seventy-nine thousand, eight hundred eleven".