688553029 has 2 divisors, whose sum is σ = 688553030. Its totient is φ = 688553028.

The previous prime is 688552993. The next prime is 688553053. The reversal of 688553029 is 920355886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 599760100 + 88792929 = 24490^2 + 9423^2 .

It is a cyclic number.

It is not a de Polignac number, because 688553029 - 2¹³ = 688544837 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688553029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688553429) 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, 344276514 + 344276515.

It is an arithmetic number, because the mean of its divisors is an integer number (344276515).

Almost surely, 2^688553029 is an apocalyptic number.

It is an amenable number.

688553029 is a deficient number, since it is larger than the sum of its proper divisors (1).

688553029 is an equidigital number, since it uses as much as digits as its factorization.

688553029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 46.

The square root of 688553029 is about 26240.2939960664. The cubic root of 688553029 is about 883.0374671958.

The spelling of 688553029 in words is "six hundred eighty-eight million, five hundred fifty-three thousand, twenty-nine".