7730813897 has 2 divisors, whose sum is σ = 7730813898. Its totient is φ = 7730813896.

The previous prime is 7730813873. The next prime is 7730814023. The reversal of 7730813897 is 7983180377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7387230601 + 343583296 = 85949^2 + 18536^2 .

It is a cyclic number.

It is not a de Polignac number, because 7730813897 - 2²⁶ = 7663705033 is a prime.

It is not a weakly prime, because it can be changed into another prime (7730812897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3865406948 + 3865406949.

It is an arithmetic number, because the mean of its divisors is an integer number (3865406949).

Almost surely, 2^7730813897 is an apocalyptic number.

It is an amenable number.

7730813897 is a deficient number, since it is larger than the sum of its proper divisors (1).

7730813897 is an equidigital number, since it uses as much as digits as its factorization.

7730813897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 53.

The square root of 7730813897 is about 87925.0470400784. The cubic root of 7730813897 is about 1977.3114120254.

The spelling of 7730813897 in words is "seven billion, seven hundred thirty million, eight hundred thirteen thousand, eight hundred ninety-seven".