4443709381 has 4 divisors (see below), whose sum is σ = 4446254752. Its totient is φ = 4441164012.

The previous prime is 4443709367. The next prime is 4443709409. The reversal of 4443709381 is 1839073444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4443709381 - 2⁵ = 4443709349 is a prime.

It is a super-2 number, since 2×4443709381² = 39493106125574806322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4443709351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1270065 + ... + 1273558.

It is an arithmetic number, because the mean of its divisors is an integer number (1111563688).

Almost surely, 2^4443709381 is an apocalyptic number.

It is an amenable number.

4443709381 is a deficient number, since it is larger than the sum of its proper divisors (2545371).

4443709381 is a wasteful number, since it uses less digits than its factorization.

4443709381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545370.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 4443709381 is about 66661.1534628677. The cubic root of 4443709381 is about 1644.0507367724.

The spelling of 4443709381 in words is "four billion, four hundred forty-three million, seven hundred nine thousand, three hundred eighty-one".