688934033 has 2 divisors, whose sum is σ = 688934034. Its totient is φ = 688934032.

The previous prime is 688934009. The next prime is 688934093. The reversal of 688934033 is 330439886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 668067409 + 20866624 = 25847^2 + 4568^2 .

It is a cyclic number.

It is not a de Polignac number, because 688934033 - 2¹² = 688929937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (688934093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344467016 + 344467017.

It is an arithmetic number, because the mean of its divisors is an integer number (344467017).

Almost surely, 2^688934033 is an apocalyptic number.

It is an amenable number.

688934033 is a deficient number, since it is larger than the sum of its proper divisors (1).

688934033 is an equidigital number, since it uses as much as digits as its factorization.

688934033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 688934033 is about 26247.5528954606. The cubic root of 688934033 is about 883.2003105096.

The spelling of 688934033 in words is "six hundred eighty-eight million, nine hundred thirty-four thousand, thirty-three".