4049367921 has 48 divisors (see below), whose sum is σ = 6427175040. Its totient is φ = 2446456320.

The previous prime is 4049367919. The next prime is 4049367943. The reversal of 4049367921 is 1297639404.

It is a happy number.

It is not a de Polignac number, because 4049367921 - 2¹ = 4049367919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4049367961) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 462775 + ... + 471443.

It is an arithmetic number, because the mean of its divisors is an integer number (133899480).

Almost surely, 2^4049367921 is an apocalyptic number.

It is an amenable number.

4049367921 is a deficient number, since it is larger than the sum of its proper divisors (2377807119).

4049367921 is a wasteful number, since it uses less digits than its factorization.

4049367921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8806 (or 8803 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 4049367921 is about 63634.6440313765. The cubic root of 4049367921 is about 1593.9049254885.

The spelling of 4049367921 in words is "four billion, forty-nine million, three hundred sixty-seven thousand, nine hundred twenty-one".