9795872821 has 16 divisors (see below), whose sum is σ = 11857224960. Its totient is φ = 7900289280.

The previous prime is 9795872813. The next prime is 9795872831. The reversal of 9795872821 is 1282785979.

It is a cyclic number.

It is not a de Polignac number, because 9795872821 - 2³ = 9795872813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9795872831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497400 + ... + 516718.

It is an arithmetic number, because the mean of its divisors is an integer number (741076560).

Almost surely, 2^9795872821 is an apocalyptic number.

It is an amenable number.

9795872821 is a deficient number, since it is larger than the sum of its proper divisors (2061352139).

9795872821 is a wasteful number, since it uses less digits than its factorization.

9795872821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23604.

The product of its digits is 5080320, while the sum is 58.

The square root of 9795872821 is about 98974.1017690992. The cubic root of 9795872821 is about 2139.6745087541.

The spelling of 9795872821 in words is "nine billion, seven hundred ninety-five million, eight hundred seventy-two thousand, eight hundred twenty-one".