138443323 has 8 divisors (see below), whose sum is σ = 141004800. Its totient is φ = 135889128.

The previous prime is 138443321. The next prime is 138443351. The reversal of 138443323 is 323344831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138443323 - 2¹ = 138443321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138443321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49558 + ... + 52276.

It is an arithmetic number, because the mean of its divisors is an integer number (17625600).

Almost surely, 2^138443323 is an apocalyptic number.

138443323 is a deficient number, since it is larger than the sum of its proper divisors (2561477).

138443323 is an equidigital number, since it uses as much as digits as its factorization.

138443323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641.

The product of its digits is 20736, while the sum is 31.

The square root of 138443323 is about 11766.1940745510. The cubic root of 138443323 is about 517.3177003419.

The spelling of 138443323 in words is "one hundred thirty-eight million, four hundred forty-three thousand, three hundred twenty-three".