7730813213 has 2 divisors, whose sum is σ = 7730813214. Its totient is φ = 7730813212.

The previous prime is 7730813159. The next prime is 7730813227. The reversal of 7730813213 is 3123180377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7688133124 + 42680089 = 87682^2 + 6533^2 .

It is a cyclic number.

It is not a de Polignac number, because 7730813213 - 2⁶ = 7730813149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7730812213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3865406606 + 3865406607.

It is an arithmetic number, because the mean of its divisors is an integer number (3865406607).

Almost surely, 2^7730813213 is an apocalyptic number.

It is an amenable number.

7730813213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7730813213 is an equidigital number, since it uses as much as digits as its factorization.

7730813213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 7730813213 is about 87925.0431504017. The cubic root of 7730813213 is about 1977.3113537098.

The spelling of 7730813213 in words is "seven billion, seven hundred thirty million, eight hundred thirteen thousand, two hundred thirteen".