9820915001 has 4 divisors (see below), whose sum is σ = 9843596532. Its totient is φ = 9798233472.

The previous prime is 9820914911. The next prime is 9820915009. The reversal of 9820915001 is 1005190289.

9820915001 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 5718384400 + 4102530601 = 75620^2 + 64051^2 .

It is a cyclic number.

It is not a de Polignac number, because 9820915001 - 2²⁶ = 9753806137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9820915009) 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, 11340116 + ... + 11340981.

It is an arithmetic number, because the mean of its divisors is an integer number (2460899133).

Almost surely, 2^9820915001 is an apocalyptic number.

It is an amenable number.

9820915001 is a deficient number, since it is larger than the sum of its proper divisors (22681531).

9820915001 is a wasteful number, since it uses less digits than its factorization.

9820915001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22681530.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 9820915001 is about 99100.5297715406. The cubic root of 9820915001 is about 2141.4962460230.

The spelling of 9820915001 in words is "nine billion, eight hundred twenty million, nine hundred fifteen thousand, one".