7864776313 has 2 divisors, whose sum is σ = 7864776314. Its totient is φ = 7864776312.

The previous prime is 7864776301. The next prime is 7864776319. The reversal of 7864776313 is 3136774687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6015088249 + 1849688064 = 77557^2 + 43008^2 .

It is an emirp because it is prime and its reverse (3136774687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7864776313 - 2⁹ = 7864775801 is a prime.

It is not a weakly prime, because it can be changed into another prime (7864776319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3932388156 + 3932388157.

It is an arithmetic number, because the mean of its divisors is an integer number (3932388157).

Almost surely, 2^7864776313 is an apocalyptic number.

It is an amenable number.

7864776313 is a deficient number, since it is larger than the sum of its proper divisors (1).

7864776313 is an equidigital number, since it uses as much as digits as its factorization.

7864776313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 52.

The square root of 7864776313 is about 88683.5740878772. The cubic root of 7864776313 is about 1988.6672652678.

The spelling of 7864776313 in words is "seven billion, eight hundred sixty-four million, seven hundred seventy-six thousand, three hundred thirteen".