7778860097 has 2 divisors, whose sum is σ = 7778860098. Its totient is φ = 7778860096.

The previous prime is 7778860087. The next prime is 7778860121. The reversal of 7778860097 is 7900688777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4970814016 + 2808046081 = 70504^2 + 52991^2 .

It is an emirp because it is prime and its reverse (7900688777) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7778860097 - 2⁴ = 7778860081 is a prime.

It is not a weakly prime, because it can be changed into another prime (7778860027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3889430048 + 3889430049.

It is an arithmetic number, because the mean of its divisors is an integer number (3889430049).

Almost surely, 2^7778860097 is an apocalyptic number.

It is an amenable number.

7778860097 is a deficient number, since it is larger than the sum of its proper divisors (1).

7778860097 is an equidigital number, since it uses as much as digits as its factorization.

7778860097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8297856, while the sum is 59.

The square root of 7778860097 is about 88197.8463285811. The cubic root of 7778860097 is about 1981.3992164820.

The spelling of 7778860097 in words is "seven billion, seven hundred seventy-eight million, eight hundred sixty thousand, ninety-seven".