7828879 has 2 divisors, whose sum is σ = 7828880. Its totient is φ = 7828878.

The previous prime is 7828853. The next prime is 7828913. The reversal of 7828879 is 9788287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7828879 - 2¹⁵ = 7796111 is a prime.

It is a super-2 number, since 2×7828879² = 122582692793282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7822879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3914439 + 3914440.

It is an arithmetic number, because the mean of its divisors is an integer number (3914440).

Almost surely, 2^7828879 is an apocalyptic number.

7828879 is a deficient number, since it is larger than the sum of its proper divisors (1).

7828879 is an equidigital number, since it uses as much as digits as its factorization.

7828879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 49.

The square root of 7828879 is about 2798.0134023982. The cubic root of 7828879 is about 198.5637015929.

The spelling of 7828879 in words is "seven million, eight hundred twenty-eight thousand, eight hundred seventy-nine".