727691 has 2 divisors, whose sum is σ = 727692. Its totient is φ = 727690.

The previous prime is 727673. The next prime is 727703. The reversal of 727691 is 196727.

727691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (196727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 727691 - 2¹⁴ = 711307 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 727691.

It is not a weakly prime, because it can be changed into another prime (727621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363845 + 363846.

It is an arithmetic number, because the mean of its divisors is an integer number (363846).

2⁷²⁷⁶⁹¹ is an apocalyptic number.

727691 is a deficient number, since it is larger than the sum of its proper divisors (1).

727691 is an equidigital number, since it uses as much as digits as its factorization.

727691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 32.

The square root of 727691 is about 853.0480642965. The cubic root of 727691 is about 89.9460994129.

The spelling of 727691 in words is "seven hundred twenty-seven thousand, six hundred ninety-one".