650801 has 4 divisors (see below), whose sum is σ = 653172. Its totient is φ = 648432.

The previous prime is 650779. The next prime is 650813. The reversal of 650801 is 108056.

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

It can be written as a sum of positive squares in 2 ways, for example, as 160801 + 490000 = 401^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 650801 - 2¹⁰ = 649777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (650821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 710 + ... + 1343.

It is an arithmetic number, because the mean of its divisors is an integer number (163293).

2⁶⁵⁰⁸⁰¹ is an apocalyptic number.

It is an amenable number.

650801 is a deficient number, since it is larger than the sum of its proper divisors (2371).

650801 is a wasteful number, since it uses less digits than its factorization.

650801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 650801 is about 806.7223809961. The cubic root of 650801 is about 86.6594783650.

Adding to 650801 its reverse (108056), we get a palindrome (758857).

The spelling of 650801 in words is "six hundred fifty thousand, eight hundred one".