4443854381 has 2 divisors, whose sum is σ = 4443854382. Its totient is φ = 4443854380.

The previous prime is 4443854339. The next prime is 4443854407. The reversal of 4443854381 is 1834583444.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4418260900 + 25593481 = 66470^2 + 5059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4443854381 is a prime.

It is a super-2 number, since 2×4443854381² = 39495683519065786322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4443854581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2221927190 + 2221927191.

It is an arithmetic number, because the mean of its divisors is an integer number (2221927191).

Almost surely, 2^4443854381 is an apocalyptic number.

It is an amenable number.

4443854381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4443854381 is an equidigital number, since it uses as much as digits as its factorization.

4443854381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 737280, while the sum is 44.

The square root of 4443854381 is about 66662.2410439373. The cubic root of 4443854381 is about 1644.0686185872.

The spelling of 4443854381 in words is "four billion, four hundred forty-three million, eight hundred fifty-four thousand, three hundred eighty-one".