6440013193 has 2 divisors, whose sum is σ = 6440013194. Its totient is φ = 6440013192.

The previous prime is 6440013161. The next prime is 6440013241. The reversal of 6440013193 is 3913100446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3587171449 + 2852841744 = 59893^2 + 53412^2 .

It is a cyclic number.

It is not a de Polignac number, because 6440013193 - 2⁵ = 6440013161 is a prime.

It is not a weakly prime, because it can be changed into another prime (6440013113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3220006596 + 3220006597.

It is an arithmetic number, because the mean of its divisors is an integer number (3220006597).

Almost surely, 2^6440013193 is an apocalyptic number.

It is an amenable number.

6440013193 is a deficient number, since it is larger than the sum of its proper divisors (1).

6440013193 is an equidigital number, since it uses as much as digits as its factorization.

6440013193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 6440013193 is about 80249.6927906892. The cubic root of 6440013193 is about 1860.4967641611.

The spelling of 6440013193 in words is "six billion, four hundred forty million, thirteen thousand, one hundred ninety-three".