649984747 has 2 divisors, whose sum is σ = 649984748. Its totient is φ = 649984746.

The previous prime is 649984733. The next prime is 649984771. The reversal of 649984747 is 747489946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649984747 - 2⁷ = 649984619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649984691 and 649984700.

It is not a weakly prime, because it can be changed into another prime (649985747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324992373 + 324992374.

It is an arithmetic number, because the mean of its divisors is an integer number (324992374).

Almost surely, 2^649984747 is an apocalyptic number.

649984747 is a deficient number, since it is larger than the sum of its proper divisors (1).

649984747 is an equidigital number, since it uses as much as digits as its factorization.

649984747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 58.

The square root of 649984747 is about 25494.7984302681. The cubic root of 649984747 is about 866.2323295212.

The spelling of 649984747 in words is "six hundred forty-nine million, nine hundred eighty-four thousand, seven hundred forty-seven".