649872829 has 2 divisors, whose sum is σ = 649872830. Its totient is φ = 649872828.

The previous prime is 649872799. The next prime is 649872857. The reversal of 649872829 is 928278946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416241604 + 233631225 = 20402^2 + 15285^2 .

It is a cyclic number.

It is not a de Polignac number, because 649872829 - 2⁷ = 649872701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649872829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649812829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324936414 + 324936415.

It is an arithmetic number, because the mean of its divisors is an integer number (324936415).

Almost surely, 2^649872829 is an apocalyptic number.

It is an amenable number.

649872829 is a deficient number, since it is larger than the sum of its proper divisors (1).

649872829 is an equidigital number, since it uses as much as digits as its factorization.

649872829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 55.

The square root of 649872829 is about 25492.6034174621. The cubic root of 649872829 is about 866.1826090956.

The spelling of 649872829 in words is "six hundred forty-nine million, eight hundred seventy-two thousand, eight hundred twenty-nine".