650139 has 16 divisors (see below), whose sum is σ = 1005312. Its totient is φ = 366048.

The previous prime is 650107. The next prime is 650179. The reversal of 650139 is 931056.

It is not a de Polignac number, because 650139 - 2⁵ = 650107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650179) 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 15 ways as a sum of consecutive naturals, for example, 1557 + ... + 1929.

It is an arithmetic number, because the mean of its divisors is an integer number (62832).

2⁶⁵⁰¹³⁹ is an apocalyptic number.

650139 is a deficient number, since it is larger than the sum of its proper divisors (355173).

650139 is a wasteful number, since it uses less digits than its factorization.

650139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 650139 is about 806.3119743623. The cubic root of 650139 is about 86.6300848240.

The spelling of 650139 in words is "six hundred fifty thousand, one hundred thirty-nine".