138603445 has 8 divisors (see below), whose sum is σ = 166468536. Its totient is φ = 110786496.

The previous prime is 138603389. The next prime is 138603457. The reversal of 138603445 is 544306831.

It is a happy number.

138603445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3090564 + 135512881 = 1758^2 + 11641^2 .

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 138603445 - 2⁷ = 138603317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138603445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5362 + ... + 17491.

It is an arithmetic number, because the mean of its divisors is an integer number (20808567).

Almost surely, 2^138603445 is an apocalyptic number.

It is an amenable number.

138603445 is a deficient number, since it is larger than the sum of its proper divisors (27865091).

138603445 is a wasteful number, since it uses less digits than its factorization.

138603445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24071.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 138603445 is about 11772.9964325145. The cubic root of 138603445 is about 517.5170647908.

The spelling of 138603445 in words is "one hundred thirty-eight million, six hundred three thousand, four hundred forty-five".