650109 has 4 divisors (see below), whose sum is σ = 866816. Its totient is φ = 433404.

The previous prime is 650107. The next prime is 650179. The reversal of 650109 is 901056.

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 not a de Polignac number, because 650109 - 2¹ = 650107 is a prime.

It is a D-number.

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

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 650109.

It is not an unprimeable number, because it can be changed into a prime (650107) 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, 108349 + ... + 108354.

It is an arithmetic number, because the mean of its divisors is an integer number (216704).

2⁶⁵⁰¹⁰⁹ is an apocalyptic number.

It is an amenable number.

650109 is a deficient number, since it is larger than the sum of its proper divisors (216707).

650109 is a wasteful number, since it uses less digits than its factorization.

650109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216706.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 650109 is about 806.2933709265. The cubic root of 650109 is about 86.6287523179.

The spelling of 650109 in words is "six hundred fifty thousand, one hundred nine".