243103139 has 2 divisors, whose sum is σ = 243103140. Its totient is φ = 243103138.

The previous prime is 243103057. The next prime is 243103177. The reversal of 243103139 is 931301342.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243103139 - 2²⁰ = 242054563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243103339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121551569 + 121551570.

It is an arithmetic number, because the mean of its divisors is an integer number (121551570).

Almost surely, 2^243103139 is an apocalyptic number.

243103139 is a deficient number, since it is larger than the sum of its proper divisors (1).

243103139 is an equidigital number, since it uses as much as digits as its factorization.

243103139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 243103139 is about 15591.7651021300. The cubic root of 243103139 is about 624.1134215739.

The spelling of 243103139 in words is "two hundred forty-three million, one hundred three thousand, one hundred thirty-nine".