7823993213 has 2 divisors, whose sum is σ = 7823993214. Its totient is φ = 7823993212.

The previous prime is 7823993207. The next prime is 7823993239. The reversal of 7823993213 is 3123993287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7608549529 + 215443684 = 87227^2 + 14678^2 .

It is a cyclic number.

It is not a de Polignac number, because 7823993213 - 2³² = 3529025917 is a prime.

It is a super-2 number, since 2×7823993213² (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 (7823993263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3911996606 + 3911996607.

It is an arithmetic number, because the mean of its divisors is an integer number (3911996607).

Almost surely, 2^7823993213 is an apocalyptic number.

It is an amenable number.

7823993213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7823993213 is an equidigital number, since it uses as much as digits as its factorization.

7823993213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 47.

The square root of 7823993213 is about 88453.3391851320. The cubic root of 7823993213 is about 1985.2238695792.

The spelling of 7823993213 in words is "seven billion, eight hundred twenty-three million, nine hundred ninety-three thousand, two hundred thirteen".