688783 has 2 divisors, whose sum is σ = 688784. Its totient is φ = 688782.

The previous prime is 688777. The next prime is 688799. The reversal of 688783 is 387886.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-688783 is a prime.

688783 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344391 + 344392.

It is an arithmetic number, because the mean of its divisors is an integer number (344392).

2⁶⁸⁸⁷⁸³ is an apocalyptic number.

688783 is a deficient number, since it is larger than the sum of its proper divisors (1).

688783 is an equidigital number, since it uses as much as digits as its factorization.

688783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 40.

The square root of 688783 is about 829.9295150794. The cubic root of 688783 is about 88.3135765316.

The spelling of 688783 in words is "six hundred eighty-eight thousand, seven hundred eighty-three".