663713 has 2 divisors, whose sum is σ = 663714. Its totient is φ = 663712.

The previous prime is 663709. The next prime is 663737. The reversal of 663713 is 317366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380689 + 283024 = 617^2 + 532^2 .

It is a cyclic number.

It is not a de Polignac number, because 663713 - 2² = 663709 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (663763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331856 + 331857.

It is an arithmetic number, because the mean of its divisors is an integer number (331857).

2⁶⁶³⁷¹³ is an apocalyptic number.

It is an amenable number.

663713 is a deficient number, since it is larger than the sum of its proper divisors (1).

663713 is an equidigital number, since it uses as much as digits as its factorization.

663713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 26.

The square root of 663713 is about 814.6858290163. The cubic root of 663713 is about 87.2288421972.

The spelling of 663713 in words is "six hundred sixty-three thousand, seven hundred thirteen".