688030129 has 2 divisors, whose sum is σ = 688030130. Its totient is φ = 688030128.

The previous prime is 688030111. The next prime is 688030159. The reversal of 688030129 is 921030886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 687645729 + 384400 = 26223^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 688030129 - 2¹³ = 688021937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (688030159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344015064 + 344015065.

It is an arithmetic number, because the mean of its divisors is an integer number (344015065).

Almost surely, 2^688030129 is an apocalyptic number.

It is an amenable number.

688030129 is a deficient number, since it is larger than the sum of its proper divisors (1).

688030129 is an equidigital number, since it uses as much as digits as its factorization.

688030129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 688030129 is about 26230.3284195986. The cubic root of 688030129 is about 882.8138788852.

The spelling of 688030129 in words is "six hundred eighty-eight million, thirty thousand, one hundred twenty-nine".