138824441 has 4 divisors (see below), whose sum is σ = 158656512. Its totient is φ = 118992372.

The previous prime is 138824381. The next prime is 138824447. The reversal of 138824441 is 144428831.

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 138824441 - 2¹⁴ = 138808057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138824447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9916025 + ... + 9916038.

It is an arithmetic number, because the mean of its divisors is an integer number (39664128).

Almost surely, 2^138824441 is an apocalyptic number.

It is an amenable number.

138824441 is a deficient number, since it is larger than the sum of its proper divisors (19832071).

138824441 is an equidigital number, since it uses as much as digits as its factorization.

138824441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19832070.

The product of its digits is 24576, while the sum is 35.

The square root of 138824441 is about 11782.3784101513. The cubic root of 138824441 is about 517.7919701026.

The spelling of 138824441 in words is "one hundred thirty-eight million, eight hundred twenty-four thousand, four hundred forty-one".