650081821 has 8 divisors (see below), whose sum is σ = 678953664. Its totient is φ = 621260640.

The previous prime is 650081807. The next prime is 650081837. The reversal of 650081821 is 128180056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 650081821 - 2¹³ = 650073629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650081801) 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 7 ways as a sum of consecutive naturals, for example, 14865 + ... + 39001.

It is an arithmetic number, because the mean of its divisors is an integer number (84869208).

Almost surely, 2^650081821 is an apocalyptic number.

It is an amenable number.

650081821 is a deficient number, since it is larger than the sum of its proper divisors (28871843).

650081821 is a wasteful number, since it uses less digits than its factorization.

650081821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25331.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 650081821 is about 25496.7021592990. The cubic root of 650081821 is about 866.2754507645.

The spelling of 650081821 in words is "six hundred fifty million, eighty-one thousand, eight hundred twenty-one".