4499399521 has 4 divisors (see below), whose sum is σ = 4499730432. Its totient is φ = 4499068612.

The previous prime is 4499399507. The next prime is 4499399533. The reversal of 4499399521 is 1259939944.

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-4499399521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4499399591) 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, 144145 + ... + 172558.

It is an arithmetic number, because the mean of its divisors is an integer number (1124932608).

Almost surely, 2^4499399521 is an apocalyptic number.

It is an amenable number.

4499399521 is a deficient number, since it is larger than the sum of its proper divisors (330911).

4499399521 is a wasteful number, since it uses less digits than its factorization.

4499399521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330910.

The product of its digits is 3149280, while the sum is 55.

The square root of 4499399521 is about 67077.5634694642. The cubic root of 4499399521 is about 1650.8901864410.

The spelling of 4499399521 in words is "four billion, four hundred ninety-nine million, three hundred ninety-nine thousand, five hundred twenty-one".