649196659 has 2 divisors, whose sum is σ = 649196660. Its totient is φ = 649196658.

The previous prime is 649196657. The next prime is 649196683. The reversal of 649196659 is 956691946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649196659 - 2¹ = 649196657 is a prime.

Together with 649196657, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (649196657) 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, 324598329 + 324598330.

It is an arithmetic number, because the mean of its divisors is an integer number (324598330).

Almost surely, 2^649196659 is an apocalyptic number.

649196659 is a deficient number, since it is larger than the sum of its proper divisors (1).

649196659 is an equidigital number, since it uses as much as digits as its factorization.

649196659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3149280, while the sum is 55.

The square root of 649196659 is about 25479.3378838619. The cubic root of 649196659 is about 865.8820939205.

The spelling of 649196659 in words is "six hundred forty-nine million, one hundred ninety-six thousand, six hundred fifty-nine".