7878954679 has 2 divisors, whose sum is σ = 7878954680. Its totient is φ = 7878954678.

The previous prime is 7878954659. The next prime is 7878954749. The reversal of 7878954679 is 9764598787.

It is an a-pointer prime, because the next prime (7878954749) can be obtained adding 7878954679 to its sum of digits (70).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7878954679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7878954619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3939477339 + 3939477340.

It is an arithmetic number, because the mean of its divisors is an integer number (3939477340).

Almost surely, 2^7878954679 is an apocalyptic number.

7878954679 is a deficient number, since it is larger than the sum of its proper divisors (1).

7878954679 is an equidigital number, since it uses as much as digits as its factorization.

7878954679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 213373440, while the sum is 70.

The square root of 7878954679 is about 88763.4760416693. The cubic root of 7878954679 is about 1989.8615830090.

The spelling of 7878954679 in words is "seven billion, eight hundred seventy-eight million, nine hundred fifty-four thousand, six hundred seventy-nine".