649282591 has 2 divisors, whose sum is σ = 649282592. Its totient is φ = 649282590.

The previous prime is 649282577. The next prime is 649282603. The reversal of 649282591 is 195282946.

649282591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649282591 - 2⁷ = 649282463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649282511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324641295 + 324641296.

It is an arithmetic number, because the mean of its divisors is an integer number (324641296).

Almost surely, 2^649282591 is an apocalyptic number.

649282591 is a deficient number, since it is larger than the sum of its proper divisors (1).

649282591 is an equidigital number, since it uses as much as digits as its factorization.

649282591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 46.

The square root of 649282591 is about 25481.0241356190. The cubic root of 649282591 is about 865.9202968781.

The spelling of 649282591 in words is "six hundred forty-nine million, two hundred eighty-two thousand, five hundred ninety-one".