688884967 has 2 divisors, whose sum is σ = 688884968. Its totient is φ = 688884966.

The previous prime is 688884947. The next prime is 688884997. The reversal of 688884967 is 769488886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688884967 - 2¹⁹ = 688360679 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 688884899 and 688884908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688884947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344442483 + 344442484.

It is an arithmetic number, because the mean of its divisors is an integer number (344442484).

Almost surely, 2^688884967 is an apocalyptic number.

688884967 is a deficient number, since it is larger than the sum of its proper divisors (1).

688884967 is an equidigital number, since it uses as much as digits as its factorization.

688884967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37158912, while the sum is 64.

The square root of 688884967 is about 26246.6182012083. The cubic root of 688884967 is about 883.1793427859.

The spelling of 688884967 in words is "six hundred eighty-eight million, eight hundred eighty-four thousand, nine hundred sixty-seven".