138203079 has 12 divisors (see below), whose sum is σ = 214356024. Its totient is φ = 78973104.

The previous prime is 138203063. The next prime is 138203083. The reversal of 138203079 is 970302831.

It is not a de Polignac number, because 138203079 - 2⁴ = 138203063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138203179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 469932 + ... + 470225.

It is an arithmetic number, because the mean of its divisors is an integer number (17863002).

Almost surely, 2^138203079 is an apocalyptic number.

138203079 is a deficient number, since it is larger than the sum of its proper divisors (76152945).

138203079 is an equidigital number, since it uses as much as digits as its factorization.

138203079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940174 (or 940167 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 138203079 is about 11755.9805631006. The cubic root of 138203079 is about 517.0182891691.

The spelling of 138203079 in words is "one hundred thirty-eight million, two hundred three thousand, seventy-nine".