4849890921 has 24 divisors (see below), whose sum is σ = 7237898304. Its totient is φ = 3127001760.

The previous prime is 4849890911. The next prime is 4849891043. The reversal of 4849890921 is 1290989484.

4849890921 is a `hidden beast` number, since 48 + 498 + 90 + 9 + 21 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-4849890921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4849890911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12006 + ... + 99216.

It is an arithmetic number, because the mean of its divisors is an integer number (301579096).

Almost surely, 2^4849890921 is an apocalyptic number.

It is an amenable number.

4849890921 is a deficient number, since it is larger than the sum of its proper divisors (2388007383).

4849890921 is a wasteful number, since it uses less digits than its factorization.

4849890921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87421 (or 87418 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 4849890921 is about 69641.1582399374. The cubic root of 4849890921 is about 1692.6895913614.

The spelling of 4849890921 in words is "four billion, eight hundred forty-nine million, eight hundred ninety thousand, nine hundred twenty-one".