4488442921 has 2 divisors, whose sum is σ = 4488442922. Its totient is φ = 4488442920.

The previous prime is 4488442873. The next prime is 4488442943. The reversal of 4488442921 is 1292448844.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4488330025 + 112896 = 66995^2 + 336^2 .

It is a cyclic number.

It is not a de Polignac number, because 4488442921 - 2¹⁵ = 4488410153 is a prime.

It is a super-2 number, since 2×4488442921² = 40292239710150024482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4488442421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2244221460 + 2244221461.

It is an arithmetic number, because the mean of its divisors is an integer number (2244221461).

Almost surely, 2^4488442921 is an apocalyptic number.

It is an amenable number.

4488442921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4488442921 is an equidigital number, since it uses as much as digits as its factorization.

4488442921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 589824, while the sum is 46.

The square root of 4488442921 is about 66995.8425650428. The cubic root of 4488442921 is about 1649.5490559543.

The spelling of 4488442921 in words is "four billion, four hundred eighty-eight million, four hundred forty-two thousand, nine hundred twenty-one".