7988081377 has 2 divisors, whose sum is σ = 7988081378. Its totient is φ = 7988081376.

The previous prime is 7988081317. The next prime is 7988081383. The reversal of 7988081377 is 7731808897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7056672016 + 931409361 = 84004^2 + 30519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7988081377 is a prime.

It is a super-2 number, since 2×7988081377² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7988081317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3994040688 + 3994040689.

It is an arithmetic number, because the mean of its divisors is an integer number (3994040689).

Almost surely, 2^7988081377 is an apocalyptic number.

It is an amenable number.

7988081377 is a deficient number, since it is larger than the sum of its proper divisors (1).

7988081377 is an equidigital number, since it uses as much as digits as its factorization.

7988081377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4741632, while the sum is 58.

The square root of 7988081377 is about 89376.0671376851. The cubic root of 7988081377 is about 1999.0062877664.

The spelling of 7988081377 in words is "seven billion, nine hundred eighty-eight million, eighty-one thousand, three hundred seventy-seven".