709691 has 2 divisors, whose sum is σ = 709692. Its totient is φ = 709690.

The previous prime is 709679. The next prime is 709693. The reversal of 709691 is 196907.

It is a strong prime.

It is an emirp because it is prime and its reverse (196907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 709691 - 2¹⁰ = 708667 is a prime.

It is a super-2 number, since 2×709691² = 1007322630962, which contains 22 as substring.

Together with 709693, it forms a pair of twin primes.

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 709691.

It is not a weakly prime, because it can be changed into another prime (709693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354845 + 354846.

It is an arithmetic number, because the mean of its divisors is an integer number (354846).

2⁷⁰⁹⁶⁹¹ is an apocalyptic number.

709691 is a deficient number, since it is larger than the sum of its proper divisors (1).

709691 is an equidigital number, since it uses as much as digits as its factorization.

709691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 709691 is about 842.4315995973. The cubic root of 709691 is about 89.1982702581.

The spelling of 709691 in words is "seven hundred nine thousand, six hundred ninety-one".