6511723 has 2 divisors, whose sum is σ = 6511724. Its totient is φ = 6511722.

The previous prime is 6511721. The next prime is 6511727. The reversal of 6511723 is 3271156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6511723 - 2¹ = 6511721 is a prime.

Together with 6511721, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6511721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255861 + 3255862.

It is an arithmetic number, because the mean of its divisors is an integer number (3255862).

Almost surely, 2^6511723 is an apocalyptic number.

6511723 is a deficient number, since it is larger than the sum of its proper divisors (1).

6511723 is an equidigital number, since it uses as much as digits as its factorization.

6511723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 25.

The square root of 6511723 is about 2551.8077905673. The cubic root of 6511723 is about 186.7376859159.

Adding to 6511723 its reverse (3271156), we get a palindrome (9782879).

It can be divided in two parts, 65 and 11723, that multiplied together give a triangular number (761995 = T₁₂₃₄).

The spelling of 6511723 in words is "six million, five hundred eleven thousand, seven hundred twenty-three".