138062549 has 4 divisors (see below), whose sum is σ = 138103020. Its totient is φ = 138022080.

The previous prime is 138062543. The next prime is 138062563. The reversal of 138062549 is 945260831.

It is a happy number.

138062549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 945260831 = 23 ⋅41098297.

It can be written as a sum of positive squares in 2 ways, for example, as 61622500 + 76440049 = 7850^2 + 8743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138062549 is a prime.

It is a super-2 number, since 2×138062549² = 38122534872754802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138062543) 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, 14594 + ... + 22115.

It is an arithmetic number, because the mean of its divisors is an integer number (34525755).

Almost surely, 2^138062549 is an apocalyptic number.

It is an amenable number.

138062549 is a deficient number, since it is larger than the sum of its proper divisors (40471).

138062549 is an equidigital number, since it uses as much as digits as its factorization.

138062549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40470.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 138062549 is about 11750.0020851062. The cubic root of 138062549 is about 516.8429886349.

It can be divided in two parts, 1380625 and 49, that multiplied together give a square (67650625 = 8225²).

The spelling of 138062549 in words is "one hundred thirty-eight million, sixty-two thousand, five hundred forty-nine".