7879867819 has 2 divisors, whose sum is σ = 7879867820. Its totient is φ = 7879867818.

The previous prime is 7879867811. The next prime is 7879867843. The reversal of 7879867819 is 9187689787.

It is a weak prime.

It is an emirp because it is prime and its reverse (9187689787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7879867819 - 2³ = 7879867811 is a prime.

It is a super-2 number, since 2×7879867819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7879867811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3939933909 + 3939933910.

It is an arithmetic number, because the mean of its divisors is an integer number (3939933910).

Almost surely, 2^7879867819 is an apocalyptic number.

7879867819 is a deficient number, since it is larger than the sum of its proper divisors (1).

7879867819 is an equidigital number, since it uses as much as digits as its factorization.

7879867819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85349376, while the sum is 70.

The square root of 7879867819 is about 88768.6195623206. The cubic root of 7879867819 is about 1989.9384524284.

The spelling of 7879867819 in words is "seven billion, eight hundred seventy-nine million, eight hundred sixty-seven thousand, eight hundred nineteen".