6840693757 has 2 divisors, whose sum is σ = 6840693758. Its totient is φ = 6840693756.

The previous prime is 6840693707. The next prime is 6840693763. The reversal of 6840693757 is 7573960486.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6042574756 + 798119001 = 77734^2 + 28251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6840693757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6840693698 and 6840693707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6840693707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3420346878 + 3420346879.

It is an arithmetic number, because the mean of its divisors is an integer number (3420346879).

Almost surely, 2^6840693757 is an apocalyptic number.

It is an amenable number.

6840693757 is a deficient number, since it is larger than the sum of its proper divisors (1).

6840693757 is an equidigital number, since it uses as much as digits as its factorization.

6840693757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The square root of 6840693757 is about 82708.4866080864. The cubic root of 6840693757 is about 1898.3081668269.

The spelling of 6840693757 in words is "six billion, eight hundred forty million, six hundred ninety-three thousand, seven hundred fifty-seven".