203678139 has 16 divisors (see below), whose sum is σ = 328624128. Its totient is φ = 109540992.

The previous prime is 203678131. The next prime is 203678149. The reversal of 203678139 is 931876302.

It is not a de Polignac number, because 203678139 - 2³ = 203678131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203678097 and 203678106.

It is not an unprimeable number, because it can be changed into a prime (203678131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284907 + ... + 285620.

It is an arithmetic number, because the mean of its divisors is an integer number (20539008).

Almost surely, 2^203678139 is an apocalyptic number.

203678139 is a deficient number, since it is larger than the sum of its proper divisors (124945989).

203678139 is a wasteful number, since it uses less digits than its factorization.

203678139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570554.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 203678139 is about 14271.5850205925. The cubic root of 203678139 is about 588.3667739251.

The spelling of 203678139 in words is "two hundred three million, six hundred seventy-eight thousand, one hundred thirty-nine".