138758441 has 4 divisors (see below), whose sum is σ = 139259652. Its totient is φ = 138257232.

The previous prime is 138758423. The next prime is 138758447. The reversal of 138758441 is 144857831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 82882816 + 55875625 = 9104^2 + 7475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138758441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138758447) 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, 250190 + ... + 250743.

It is an arithmetic number, because the mean of its divisors is an integer number (34814913).

Almost surely, 2^138758441 is an apocalyptic number.

It is an amenable number.

138758441 is a deficient number, since it is larger than the sum of its proper divisors (501211).

138758441 is an equidigital number, since it uses as much as digits as its factorization.

138758441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501210.

The product of its digits is 107520, while the sum is 41.

The square root of 138758441 is about 11779.5772844360. The cubic root of 138758441 is about 517.7099007712.

The spelling of 138758441 in words is "one hundred thirty-eight million, seven hundred fifty-eight thousand, four hundred forty-one".