4389044981 has 2 divisors, whose sum is σ = 4389044982. Its totient is φ = 4389044980.

The previous prime is 4389044953. The next prime is 4389044983. The reversal of 4389044981 is 1894409834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3643208881 + 745836100 = 60359^2 + 27310^2 .

It is a cyclic number.

It is not a de Polignac number, because 4389044981 - 2⁶ = 4389044917 is a prime.

It is a super-2 number, since 2×4389044981² = 38527431690482580722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 4389044983, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4389044983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2194522490 + 2194522491.

It is an arithmetic number, because the mean of its divisors is an integer number (2194522491).

Almost surely, 2^4389044981 is an apocalyptic number.

It is an amenable number.

4389044981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4389044981 is an equidigital number, since it uses as much as digits as its factorization.

4389044981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 4389044981 is about 66249.8677810001. The cubic root of 4389044981 is about 1637.2814594506.

The spelling of 4389044981 in words is "four billion, three hundred eighty-nine million, forty-four thousand, nine hundred eighty-one".