7789249313 has 2 divisors, whose sum is σ = 7789249314. Its totient is φ = 7789249312.

The previous prime is 7789249301. The next prime is 7789249337. The reversal of 7789249313 is 3139429877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4924109584 + 2865139729 = 70172^2 + 53527^2 .

It is a cyclic number.

It is not a de Polignac number, because 7789249313 - 2⁴ = 7789249297 is a prime.

It is not a weakly prime, because it can be changed into another prime (7789249343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3894624656 + 3894624657.

It is an arithmetic number, because the mean of its divisors is an integer number (3894624657).

Almost surely, 2^7789249313 is an apocalyptic number.

It is an amenable number.

7789249313 is a deficient number, since it is larger than the sum of its proper divisors (1).

7789249313 is an equidigital number, since it uses as much as digits as its factorization.

7789249313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 53.

The square root of 7789249313 is about 88256.7238968227. The cubic root of 7789249313 is about 1982.2809235127.

The spelling of 7789249313 in words is "seven billion, seven hundred eighty-nine million, two hundred forty-nine thousand, three hundred thirteen".