1338183943 has 4 divisors (see below), whose sum is σ = 1338513568. Its totient is φ = 1337854320.

The previous prime is 1338183893. The next prime is 1338183947. The reversal of 1338183943 is 3493818331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3493818331 = 2311 ⋅1511821.

It is a cyclic number.

It is not a de Polignac number, because 1338183943 - 2¹⁷ = 1338052871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1338183943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338183947) 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, 158646 + ... + 166867.

It is an arithmetic number, because the mean of its divisors is an integer number (334628392).

Almost surely, 2^1338183943 is an apocalyptic number.

1338183943 is a deficient number, since it is larger than the sum of its proper divisors (329625).

1338183943 is an equidigital number, since it uses as much as digits as its factorization.

1338183943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329624.

The product of its digits is 186624, while the sum is 43.

The square root of 1338183943 is about 36581.1965769301. The cubic root of 1338183943 is about 1101.9754977243.

The spelling of 1338183943 in words is "one billion, three hundred thirty-eight million, one hundred eighty-three thousand, nine hundred forty-three".