6723749817 has 10 divisors (see below), whose sum is σ = 10044120218. Its totient is φ = 4482499824.

The previous prime is 6723749807. The next prime is 6723749861. The reversal of 6723749817 is 7189473276.

It can be written as a sum of positive squares in only one way, i.e., 5309162496 + 1414587321 = 72864^2 + 37611^2 .

It is not a de Polignac number, because 6723749817 - 2⁴ = 6723749801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6723749807) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 41504548 + ... + 41504709.

Almost surely, 2^6723749817 is an apocalyptic number.

It is an amenable number.

6723749817 is a deficient number, since it is larger than the sum of its proper divisors (3320370401).

6723749817 is an equidigital number, since it uses as much as digits as its factorization.

6723749817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83009269 (or 83009260 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 54.

The square root of 6723749817 is about 81998.4744797121. The cubic root of 6723749817 is about 1887.4285286271.

The spelling of 6723749817 in words is "six billion, seven hundred twenty-three million, seven hundred forty-nine thousand, eight hundred seventeen".