689676428633 has 2 divisors, whose sum is σ = 689676428634. Its totient is φ = 689676428632.

The previous prime is 689676428603. The next prime is 689676428677. The reversal of 689676428633 is 336824676986.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 623867761609 + 65808667024 = 789853^2 + 256532^2 .

It is a cyclic number.

It is not a de Polignac number, because 689676428633 - 2²⁸ = 689407993177 is a prime.

It is not a weakly prime, because it can be changed into another prime (689676428603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344838214316 + 344838214317.

It is an arithmetic number, because the mean of its divisors is an integer number (344838214317).

Almost surely, 2^689676428633 is an apocalyptic number.

It is an amenable number.

689676428633 is a deficient number, since it is larger than the sum of its proper divisors (1).

689676428633 is an equidigital number, since it uses as much as digits as its factorization.

689676428633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 376233984, while the sum is 68.

The spelling of 689676428633 in words is "six hundred eighty-nine billion, six hundred seventy-six million, four hundred twenty-eight thousand, six hundred thirty-three".