9872812621 has 16 divisors (see below), whose sum is σ = 11527819776. Its totient is φ = 8279099136.

The previous prime is 9872812603. The next prime is 9872812627. The reversal of 9872812621 is 1262182789.

9872812621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9872812621 - 2¹⁵ = 9872779853 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 (9872812627) 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 15 ways as a sum of consecutive naturals, for example, 1212255 + ... + 1220371.

It is an arithmetic number, because the mean of its divisors is an integer number (720488736).

Almost surely, 2^9872812621 is an apocalyptic number.

It is an amenable number.

9872812621 is a deficient number, since it is larger than the sum of its proper divisors (1655007155).

9872812621 is a wasteful number, since it uses less digits than its factorization.

9872812621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11868.

The product of its digits is 193536, while the sum is 46.

The square root of 9872812621 is about 99362.0280640447. The cubic root of 9872812621 is about 2145.2617934738.

The spelling of 9872812621 in words is "nine billion, eight hundred seventy-two million, eight hundred twelve thousand, six hundred twenty-one".