7691816213 has 2 divisors, whose sum is σ = 7691816214. Its totient is φ = 7691816212.

The previous prime is 7691816203. The next prime is 7691816219. The reversal of 7691816213 is 3126181967.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7691816209 + 4 = 87703^2 + 2^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7691816213 is a prime.

It is a super-2 number, since 2×7691816213² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7691816219) 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, 3845908106 + 3845908107.

It is an arithmetic number, because the mean of its divisors is an integer number (3845908107).

Almost surely, 2^7691816213 is an apocalyptic number.

It is an amenable number.

7691816213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7691816213 is an equidigital number, since it uses as much as digits as its factorization.

7691816213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 7691816213 is about 87703.0000228042. Note that the first 4 decimals coincide. The cubic root of 7691816213 is about 1973.9809912226.

The spelling of 7691816213 in words is "seven billion, six hundred ninety-one million, eight hundred sixteen thousand, two hundred thirteen".