4899805921 has 4 divisors (see below), whose sum is σ = 4968817344. Its totient is φ = 4830794500.

The previous prime is 4899805853. The next prime is 4899805949. The reversal of 4899805921 is 1295089984.

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 not a de Polignac number, because 4899805921 - 2⁷ = 4899805793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4899805951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34505605 + ... + 34505746.

It is an arithmetic number, because the mean of its divisors is an integer number (1242204336).

Almost surely, 2^4899805921 is an apocalyptic number.

It is an amenable number.

4899805921 is a deficient number, since it is larger than the sum of its proper divisors (69011423).

4899805921 is an equidigital number, since it uses as much as digits as its factorization.

4899805921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69011422.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The square root of 4899805921 is about 69998.6137077014. The cubic root of 4899805921 is about 1698.4768272494.

The spelling of 4899805921 in words is "four billion, eight hundred ninety-nine million, eight hundred five thousand, nine hundred twenty-one".