650016121 has 4 divisors (see below), whose sum is σ = 672430500. Its totient is φ = 627601744.

The previous prime is 650016113. The next prime is 650016149. The reversal of 650016121 is 121610056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 486687721 + 163328400 = 22061^2 + 12780^2 .

It is a cyclic number.

It is not a de Polignac number, because 650016121 - 2³ = 650016113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 650016092 and 650016101.

It is not an unprimeable number, because it can be changed into a prime (650016151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11207146 + ... + 11207203.

It is an arithmetic number, because the mean of its divisors is an integer number (168107625).

Almost surely, 2^650016121 is an apocalyptic number.

It is an amenable number.

650016121 is a deficient number, since it is larger than the sum of its proper divisors (22414379).

650016121 is a wasteful number, since it uses less digits than its factorization.

650016121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22414378.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 650016121 is about 25495.4137248251. The cubic root of 650016121 is about 866.2462666359.

Adding to 650016121 its reverse (121610056), we get a palindrome (771626177).

The spelling of 650016121 in words is "six hundred fifty million, sixteen thousand, one hundred twenty-one".