138784403 has 8 divisors (see below), whose sum is σ = 142257360. Its totient is φ = 135352800.

The previous prime is 138784397. The next prime is 138784409. The reversal of 138784403 is 304487831.

It is an interprime number because it is at equal distance from previous prime (138784397) and next prime (138784409).

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 138784403 - 2²⁴ = 122007187 is a prime.

It is a super-2 number, since 2×138784403² = 38522221032132818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138784409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3488 + ... + 17021.

It is an arithmetic number, because the mean of its divisors is an integer number (17782170).

Almost surely, 2^138784403 is an apocalyptic number.

138784403 is a deficient number, since it is larger than the sum of its proper divisors (3472957).

138784403 is a wasteful number, since it uses less digits than its factorization.

138784403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20677.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 138784403 is about 11780.6792249004. The cubic root of 138784403 is about 517.7421869662.

It can be divided in two parts, 13878 and 4403, that added together give a palindrome (18281).

The spelling of 138784403 in words is "one hundred thirty-eight million, seven hundred eighty-four thousand, four hundred three".