650399 has 4 divisors (see below), whose sum is σ = 653136. Its totient is φ = 647664.

The previous prime is 650387. The next prime is 650401. The reversal of 650399 is 993056.

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 650399 - 2¹⁶ = 584863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974 + ... + 1499.

It is an arithmetic number, because the mean of its divisors is an integer number (163284).

2⁶⁵⁰³⁹⁹ is an apocalyptic number.

650399 is a deficient number, since it is larger than the sum of its proper divisors (2737).

650399 is a wasteful number, since it uses less digits than its factorization.

650399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 650399 is about 806.4731861631. The cubic root of 650399 is about 86.6416314934.

It can be divided in two parts, 6 and 50399, that added together give a palindrome (50405).

The spelling of 650399 in words is "six hundred fifty thousand, three hundred ninety-nine".