648585829 has 2 divisors, whose sum is σ = 648585830. Its totient is φ = 648585828.

The previous prime is 648585803. The next prime is 648585877. The reversal of 648585829 is 928585846.

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., 641456929 + 7128900 = 25327^2 + 2670^2 .

It is a cyclic number.

It is not a de Polignac number, because 648585829 - 2⁷ = 648585701 is a prime.

It is a super-3 number, since 3×648585829³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 648585829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648582829) 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, 324292914 + 324292915.

It is an arithmetic number, because the mean of its divisors is an integer number (324292915).

Almost surely, 2^648585829 is an apocalyptic number.

It is an amenable number.

648585829 is a deficient number, since it is larger than the sum of its proper divisors (1).

648585829 is an equidigital number, since it uses as much as digits as its factorization.

648585829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5529600, while the sum is 55.

The square root of 648585829 is about 25467.3482914888. The cubic root of 648585829 is about 865.6104388311.

The spelling of 648585829 in words is "six hundred forty-eight million, five hundred eighty-five thousand, eight hundred twenty-nine".