649953247 has 2 divisors, whose sum is σ = 649953248. Its totient is φ = 649953246.

The previous prime is 649953233. The next prime is 649953277. The reversal of 649953247 is 742359946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649953247 - 2⁷ = 649953119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649953247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649953277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324976623 + 324976624.

It is an arithmetic number, because the mean of its divisors is an integer number (324976624).

Almost surely, 2^649953247 is an apocalyptic number.

649953247 is a deficient number, since it is larger than the sum of its proper divisors (1).

649953247 is an equidigital number, since it uses as much as digits as its factorization.

649953247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 49.

The square root of 649953247 is about 25494.1806497091. The cubic root of 649953247 is about 866.2183359830.

The spelling of 649953247 in words is "six hundred forty-nine million, nine hundred fifty-three thousand, two hundred forty-seven".