2921923081 has 8 divisors (see below), whose sum is σ = 3642917184. Its totient is φ = 2276823120.

The previous prime is 2921923049. The next prime is 2921923099. The reversal of 2921923081 is 1803291292.

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

It is not a de Polignac number, because 2921923081 - 2⁵ = 2921923049 is a prime.

It is a super-2 number, since 2×2921923081² = 17075268982561065122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2921923081.

It is not an unprimeable number, because it can be changed into a prime (2921923181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18973450 + ... + 18973603.

It is an arithmetic number, because the mean of its divisors is an integer number (455364648).

Almost surely, 2^2921923081 is an apocalyptic number.

It is an amenable number.

2921923081 is a deficient number, since it is larger than the sum of its proper divisors (720994103).

2921923081 is a wasteful number, since it uses less digits than its factorization.

2921923081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37947071.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 2921923081 is about 54054.8155209136. The cubic root of 2921923081 is about 1429.6276078915.

The spelling of 2921923081 in words is "two billion, nine hundred twenty-one million, nine hundred twenty-three thousand, eighty-one".