1138205443 has 4 divisors (see below), whose sum is σ = 1142436960. Its totient is φ = 1133973928.

The previous prime is 1138205441. The next prime is 1138205449. The reversal of 1138205443 is 3445028311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1138205443 - 2¹ = 1138205441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138205441) 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, 2115355 + ... + 2115892.

It is an arithmetic number, because the mean of its divisors is an integer number (285609240).

Almost surely, 2^1138205443 is an apocalyptic number.

1138205443 is a deficient number, since it is larger than the sum of its proper divisors (4231517).

1138205443 is an equidigital number, since it uses as much as digits as its factorization.

1138205443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4231516.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1138205443 is about 33737.3004699546. The cubic root of 1138205443 is about 1044.0954889220.

The spelling of 1138205443 in words is "one billion, one hundred thirty-eight million, two hundred five thousand, four hundred forty-three".