7804127813 has 2 divisors, whose sum is σ = 7804127814. Its totient is φ = 7804127812.

The previous prime is 7804127789. The next prime is 7804127843. The reversal of 7804127813 is 3187214087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7803425569 + 702244 = 88337^2 + 838^2 .

It is an emirp because it is prime and its reverse (3187214087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7804127813 - 2²² = 7799933509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7804127843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3902063906 + 3902063907.

It is an arithmetic number, because the mean of its divisors is an integer number (3902063907).

Almost surely, 2^7804127813 is an apocalyptic number.

It is an amenable number.

7804127813 is a deficient number, since it is larger than the sum of its proper divisors (1).

7804127813 is an equidigital number, since it uses as much as digits as its factorization.

7804127813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 7804127813 is about 88340.9747116252. The cubic root of 7804127813 is about 1983.5422606322.

The spelling of 7804127813 in words is "seven billion, eight hundred four million, one hundred twenty-seven thousand, eight hundred thirteen".