138603455 has 8 divisors (see below), whose sum is σ = 166988304. Its totient is φ = 110440000.

The previous prime is 138603389. The next prime is 138603457. The reversal of 138603455 is 554306831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138603455 - 2¹⁸ = 138341311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138603457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53966 + ... + 56475.

It is an arithmetic number, because the mean of its divisors is an integer number (20873538).

Almost surely, 2^138603455 is an apocalyptic number.

138603455 is a deficient number, since it is larger than the sum of its proper divisors (28384849).

138603455 is a wasteful number, since it uses less digits than its factorization.

138603455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110697.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 138603455 is about 11772.9968572152. The cubic root of 138603455 is about 517.5170772368.

The spelling of 138603455 in words is "one hundred thirty-eight million, six hundred three thousand, four hundred fifty-five".