688020163 has 2 divisors, whose sum is σ = 688020164. Its totient is φ = 688020162.

The previous prime is 688020131. The next prime is 688020233. The reversal of 688020163 is 361020886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688020163 - 2⁵ = 688020131 is a prime.

It is not a weakly prime, because it can be changed into another prime (688020763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344010081 + 344010082.

It is an arithmetic number, because the mean of its divisors is an integer number (344010082).

Almost surely, 2^688020163 is an apocalyptic number.

688020163 is a deficient number, since it is larger than the sum of its proper divisors (1).

688020163 is an equidigital number, since it uses as much as digits as its factorization.

688020163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 688020163 is about 26230.1384479762. The cubic root of 688020163 is about 882.8096163947.

The spelling of 688020163 in words is "six hundred eighty-eight million, twenty thousand, one hundred sixty-three".