650442421 has 4 divisors (see below), whose sum is σ = 672871500. Its totient is φ = 628013344.

The previous prime is 650442391. The next prime is 650442433. The reversal of 650442421 is 124244056.

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 128822500 + 521619921 = 11350^2 + 22839^2 .

It is a cyclic number.

It is not a de Polignac number, because 650442421 - 2⁷ = 650442293 is a prime.

It is a super-3 number, since 3×650442421³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 650442421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650440421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11214496 + ... + 11214553.

It is an arithmetic number, because the mean of its divisors is an integer number (168217875).

Almost surely, 2^650442421 is an apocalyptic number.

It is an amenable number.

650442421 is a deficient number, since it is larger than the sum of its proper divisors (22429079).

650442421 is a wasteful number, since it uses less digits than its factorization.

650442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22429078.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 650442421 is about 25503.7726817034. The cubic root of 650442421 is about 866.4355953168.

Adding to 650442421 its reverse (124244056), we get a palindrome (774686477).

The spelling of 650442421 in words is "six hundred fifty million, four hundred forty-two thousand, four hundred twenty-one".