709663 has 2 divisors, whose sum is σ = 709664. Its totient is φ = 709662.

The previous prime is 709651. The next prime is 709673. The reversal of 709663 is 366907.

It is a strong prime.

It is an emirp because it is prime and its reverse (366907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 709663 - 2⁹ = 709151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (709603) 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, 354831 + 354832.

It is an arithmetic number, because the mean of its divisors is an integer number (354832).

2⁷⁰⁹⁶⁶³ is an apocalyptic number.

709663 is a deficient number, since it is larger than the sum of its proper divisors (1).

709663 is an equidigital number, since it uses as much as digits as its factorization.

709663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 709663 is about 842.4149808734. The cubic root of 709663 is about 89.1970971727.

The spelling of 709663 in words is "seven hundred nine thousand, six hundred sixty-three".