138054845 has 4 divisors (see below), whose sum is σ = 165665820. Its totient is φ = 110443872.

The previous prime is 138054823. The next prime is 138054853. The reversal of 138054845 is 548450831.

138054845 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: 548450831 = 109 ⋅5031659.

It can be written as a sum of positive squares in 2 ways, for example, as 95374756 + 42680089 = 9766^2 + 6533^2 .

It is a cyclic number.

It is not a de Polignac number, because 138054845 - 2¹⁶ = 137989309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138054799 and 138054808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13805480 + ... + 13805489.

It is an arithmetic number, because the mean of its divisors is an integer number (41416455).

Almost surely, 2^138054845 is an apocalyptic number.

It is an amenable number.

138054845 is a deficient number, since it is larger than the sum of its proper divisors (27610975).

138054845 is an equidigital number, since it uses as much as digits as its factorization.

138054845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27610974.

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 138054845 is about 11749.6742508037. The cubic root of 138054845 is about 516.8333750396.

The spelling of 138054845 in words is "one hundred thirty-eight million, fifty-four thousand, eight hundred forty-five".