688703801 has 2 divisors, whose sum is σ = 688703802. Its totient is φ = 688703800.

The previous prime is 688703791. The next prime is 688703833. The reversal of 688703801 is 108307886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 684607225 + 4096576 = 26165^2 + 2024^2 .

It is a cyclic number.

It is not a de Polignac number, because 688703801 - 2¹⁸ = 688441657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (688703891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344351900 + 344351901.

It is an arithmetic number, because the mean of its divisors is an integer number (344351901).

Almost surely, 2^688703801 is an apocalyptic number.

It is an amenable number.

688703801 is a deficient number, since it is larger than the sum of its proper divisors (1).

688703801 is an equidigital number, since it uses as much as digits as its factorization.

688703801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 688703801 is about 26243.1667486986. The cubic root of 688703801 is about 883.1019152015.

The spelling of 688703801 in words is "six hundred eighty-eight million, seven hundred three thousand, eight hundred one".