4447921137 has 16 divisors (see below), whose sum is σ = 6678405120. Its totient is φ = 2608750800.

The previous prime is 4447921117. The next prime is 4447921141. The reversal of 4447921137 is 7311297444.

It is not a de Polignac number, because 4447921137 - 2¹² = 4447917041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4447921117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2172937 + ... + 2174982.

It is an arithmetic number, because the mean of its divisors is an integer number (417400320).

Almost surely, 2^4447921137 is an apocalyptic number.

It is an amenable number.

4447921137 is a deficient number, since it is larger than the sum of its proper divisors (2230483983).

4447921137 is a wasteful number, since it uses less digits than its factorization.

4447921137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347964.

The product of its digits is 169344, while the sum is 42.

The square root of 4447921137 is about 66692.7367634587. The cubic root of 4447921137 is about 1644.5699842057.

The spelling of 4447921137 in words is "four billion, four hundred forty-seven million, nine hundred twenty-one thousand, one hundred thirty-seven".