649829 has 2 divisors, whose sum is σ = 649830. Its totient is φ = 649828.

The previous prime is 649813. The next prime is 649843. The reversal of 649829 is 928946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372100 + 277729 = 610^2 + 527^2 .

It is a cyclic number.

It is not a de Polignac number, because 649829 - 2⁴ = 649813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649792 and 649801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324914 + 324915.

It is an arithmetic number, because the mean of its divisors is an integer number (324915).

2⁶⁴⁹⁸²⁹ is an apocalyptic number.

It is an amenable number.

649829 is a deficient number, since it is larger than the sum of its proper divisors (1).

649829 is an equidigital number, since it uses as much as digits as its factorization.

649829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 649829 is about 806.1197181561. The cubic root of 649829 is about 86.6163136172.

The spelling of 649829 in words is "six hundred forty-nine thousand, eight hundred twenty-nine".