9001828921 has 4 divisors (see below), whose sum is σ = 9008348644. Its totient is φ = 8995309200.

The previous prime is 9001828909. The next prime is 9001829003. The reversal of 9001828921 is 1298281009.

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 6518301696 + 2483527225 = 80736^2 + 49835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9001828921 is a prime.

It is a super-3 number, since 3×9001828921³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9001838921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3257790 + ... + 3260551.

It is an arithmetic number, because the mean of its divisors is an integer number (2252087161).

Almost surely, 2^9001828921 is an apocalyptic number.

It is an amenable number.

9001828921 is a deficient number, since it is larger than the sum of its proper divisors (6519723).

9001828921 is a wasteful number, since it uses less digits than its factorization.

9001828921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6519722.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 9001828921 is about 94877.9685754285. The cubic root of 9001828921 is about 2080.2247138415.

The spelling of 9001828921 in words is "nine billion, one million, eight hundred twenty-eight thousand, nine hundred twenty-one".