649208353 has 2 divisors, whose sum is σ = 649208354. Its totient is φ = 649208352.

The previous prime is 649208341. The next prime is 649208369. The reversal of 649208353 is 353802946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379197729 + 270010624 = 19473^2 + 16432^2 .

It is a cyclic number.

It is not a de Polignac number, because 649208353 - 2¹³ = 649200161 is a prime.

It is not a weakly prime, because it can be changed into another prime (649208303) 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, 324604176 + 324604177.

It is an arithmetic number, because the mean of its divisors is an integer number (324604177).

Almost surely, 2^649208353 is an apocalyptic number.

It is an amenable number.

649208353 is a deficient number, since it is larger than the sum of its proper divisors (1).

649208353 is an equidigital number, since it uses as much as digits as its factorization.

649208353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 649208353 is about 25479.5673628890. The cubic root of 649208353 is about 865.8872929431.

The spelling of 649208353 in words is "six hundred forty-nine million, two hundred eight thousand, three hundred fifty-three".