7988778827 has 2 divisors, whose sum is σ = 7988778828. Its totient is φ = 7988778826.

The previous prime is 7988778793. The next prime is 7988778851. The reversal of 7988778827 is 7288778897.

It is a strong prime.

It is an emirp because it is prime and its reverse (7288778897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7988778827 - 2²² = 7984584523 is a prime.

It is not a weakly prime, because it can be changed into another prime (7928778827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3994389413 + 3994389414.

It is an arithmetic number, because the mean of its divisors is an integer number (3994389414).

Almost surely, 2^7988778827 is an apocalyptic number.

7988778827 is a deficient number, since it is larger than the sum of its proper divisors (1).

7988778827 is an equidigital number, since it uses as much as digits as its factorization.

7988778827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 177020928, while the sum is 71.

The square root of 7988778827 is about 89379.9688241163. The cubic root of 7988778827 is about 1999.0644647051.

The spelling of 7988778827 in words is "seven billion, nine hundred eighty-eight million, seven hundred seventy-eight thousand, eight hundred twenty-seven".