4849921813 has 4 divisors (see below), whose sum is σ = 5290823808. Its totient is φ = 4409019820.

The previous prime is 4849921801. The next prime is 4849921829. The reversal of 4849921813 is 3181299484.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4849921813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4849921873) 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, 220450981 + ... + 220451002.

It is an arithmetic number, because the mean of its divisors is an integer number (1322705952).

Almost surely, 2^4849921813 is an apocalyptic number.

It is an amenable number.

4849921813 is a deficient number, since it is larger than the sum of its proper divisors (440901995).

4849921813 is a wasteful number, since it uses less digits than its factorization.

4849921813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440901994.

The product of its digits is 497664, while the sum is 49.

The square root of 4849921813 is about 69641.3800337127. The cubic root of 4849921813 is about 1692.6931852880.

The spelling of 4849921813 in words is "four billion, eight hundred forty-nine million, nine hundred twenty-one thousand, eight hundred thirteen".