6691723 has 2 divisors, whose sum is σ = 6691724. Its totient is φ = 6691722.

The previous prime is 6691697. The next prime is 6691771. The reversal of 6691723 is 3271966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6691723 - 2¹³ = 6683531 is a prime.

It is not a weakly prime, because it can be changed into another prime (6691793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345861 + 3345862.

It is an arithmetic number, because the mean of its divisors is an integer number (3345862).

Almost surely, 2^6691723 is an apocalyptic number.

6691723 is a deficient number, since it is larger than the sum of its proper divisors (1).

6691723 is an equidigital number, since it uses as much as digits as its factorization.

6691723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 34.

The square root of 6691723 is about 2586.8364849754. The cubic root of 6691723 is about 188.4427001151.

The spelling of 6691723 in words is "six million, six hundred ninety-one thousand, seven hundred twenty-three".