138867403 has 4 divisors (see below), whose sum is σ = 138908088. Its totient is φ = 138826720.

The previous prime is 138867343. The next prime is 138867433. The reversal of 138867403 is 304768831.

138867403 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: 304768831 = 1039 ⋅293329.

It is a cyclic number.

It is not a de Polignac number, because 138867403 - 2⁹ = 138866891 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138867433) 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, 14701 + ... + 22222.

It is an arithmetic number, because the mean of its divisors is an integer number (34727022).

Almost surely, 2^138867403 is an apocalyptic number.

138867403 is a deficient number, since it is larger than the sum of its proper divisors (40685).

138867403 is an equidigital number, since it uses as much as digits as its factorization.

138867403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40684.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 138867403 is about 11784.2014154545. The cubic root of 138867403 is about 517.8453782875.

The spelling of 138867403 in words is "one hundred thirty-eight million, eight hundred sixty-seven thousand, four hundred three".