7728775097 has 2 divisors, whose sum is σ = 7728775098. Its totient is φ = 7728775096.

The previous prime is 7728775079. The next prime is 7728775111. The reversal of 7728775097 is 7905778277.

Together with previous prime (7728775079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7248989881 + 479785216 = 85141^2 + 21904^2 .

It is a cyclic number.

It is not a de Polignac number, because 7728775097 - 2¹⁶ = 7728709561 is a prime.

It is not a weakly prime, because it can be changed into another prime (7728775057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3864387548 + 3864387549.

It is an arithmetic number, because the mean of its divisors is an integer number (3864387549).

Almost surely, 2^7728775097 is an apocalyptic number.

It is an amenable number.

7728775097 is a deficient number, since it is larger than the sum of its proper divisors (1).

7728775097 is an equidigital number, since it uses as much as digits as its factorization.

7728775097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12101040, while the sum is 59.

The square root of 7728775097 is about 87913.4523096437. The cubic root of 7728775097 is about 1977.1375753505.

The spelling of 7728775097 in words is "seven billion, seven hundred twenty-eight million, seven hundred seventy-five thousand, ninety-seven".