650389 has 4 divisors (see below), whose sum is σ = 684640. Its totient is φ = 616140.

The previous prime is 650387. The next prime is 650401. The reversal of 650389 is 983056.

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 650389 - 2¹ = 650387 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 650389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650387) 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, 17097 + ... + 17134.

It is an arithmetic number, because the mean of its divisors is an integer number (171160).

2⁶⁵⁰³⁸⁹ is an apocalyptic number.

It is an amenable number.

650389 is a deficient number, since it is larger than the sum of its proper divisors (34251).

650389 is a wasteful number, since it uses less digits than its factorization.

650389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34250.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 650389 is about 806.4669863051. The cubic root of 650389 is about 86.6411874476.

The spelling of 650389 in words is "six hundred fifty thousand, three hundred eighty-nine".