650044013 has 4 divisors (see below), whose sum is σ = 650919648. Its totient is φ = 649168380.

The previous prime is 650044007. The next prime is 650044037. The reversal of 650044013 is 310440056.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 650044013 - 2¹⁰ = 650042989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 650044013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650044513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436703 + ... + 438188.

It is an arithmetic number, because the mean of its divisors is an integer number (162729912).

Almost surely, 2^650044013 is an apocalyptic number.

It is an amenable number.

650044013 is a deficient number, since it is larger than the sum of its proper divisors (875635).

650044013 is an equidigital number, since it uses as much as digits as its factorization.

650044013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875634.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 650044013 is about 25495.9607192983. The cubic root of 650044013 is about 866.2586565826.

Adding to 650044013 its reverse (310440056), we get a palindrome (960484069).

The spelling of 650044013 in words is "six hundred fifty million, forty-four thousand, thirteen".