650786491 has 4 divisors (see below), whose sum is σ = 661455184. Its totient is φ = 640117800.

The previous prime is 650786473. The next prime is 650786501. The reversal of 650786491 is 194687056.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 650786491 - 2⁷ = 650786363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650780491) 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 in 3 ways as a sum of consecutive naturals, for example, 5334255 + ... + 5334376.

It is an arithmetic number, because the mean of its divisors is an integer number (165363796).

Almost surely, 2^650786491 is an apocalyptic number.

650786491 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

650786491 is a deficient number, since it is larger than the sum of its proper divisors (10668693).

650786491 is a wasteful number, since it uses less digits than its factorization.

650786491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10668692.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 650786491 is about 25510.5172624939. The cubic root of 650786491 is about 866.5883436287.

The spelling of 650786491 in words is "six hundred fifty million, seven hundred eighty-six thousand, four hundred ninety-one".