4154989921 has 8 divisors (see below), whose sum is σ = 4174610688. Its totient is φ = 4135404000.

The previous prime is 4154989919. The next prime is 4154989973. The reversal of 4154989921 is 1299894514.

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

It is a cyclic number.

It is not a de Polignac number, because 4154989921 - 2¹ = 4154989919 is a prime.

It is a super-2 number, since 2×4154989921² = 34527882487223172482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4154989991) 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 7 ways as a sum of consecutive naturals, for example, 247876 + ... + 264106.

It is an arithmetic number, because the mean of its divisors is an integer number (521826336).

Almost surely, 2^4154989921 is an apocalyptic number.

It is an amenable number.

4154989921 is a deficient number, since it is larger than the sum of its proper divisors (19620767).

4154989921 is a wasteful number, since it uses less digits than its factorization.

4154989921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17423.

The product of its digits is 933120, while the sum is 52.

The square root of 4154989921 is about 64459.2112967573. The cubic root of 4154989921 is about 1607.6443981168.

The spelling of 4154989921 in words is "four billion, one hundred fifty-four million, nine hundred eighty-nine thousand, nine hundred twenty-one".