9449359821 has 24 divisors (see below), whose sum is σ = 14975996256. Its totient is φ = 5693771040.

The previous prime is 9449359793. The next prime is 9449359897. The reversal of 9449359821 is 1289539449.

9449359821 is a `hidden beast` number, since 9 + 4 + 49 + 3 + 598 + 2 + 1 = 666.

It is not a de Polignac number, because 9449359821 - 2¹⁰ = 9449358797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9449359121) 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, 258735 + ... + 292988.

It is an arithmetic number, because the mean of its divisors is an integer number (623999844).

Almost surely, 2^9449359821 is an apocalyptic number.

It is an amenable number.

9449359821 is a deficient number, since it is larger than the sum of its proper divisors (5526636435).

9449359821 is a wasteful number, since it uses less digits than its factorization.

9449359821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551913 (or 551910 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 9449359821 is about 97207.8176948747. The cubic root of 9449359821 is about 2114.1418774551.

The spelling of 9449359821 in words is "nine billion, four hundred forty-nine million, three hundred fifty-nine thousand, eight hundred twenty-one".