1239138233 has 2 divisors, whose sum is σ = 1239138234. Its totient is φ = 1239138232.

The previous prime is 1239138161. The next prime is 1239138247. The reversal of 1239138233 is 3328319321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1233625129 + 5513104 = 35123^2 + 2348^2 .

It is a cyclic number.

It is not a de Polignac number, because 1239138233 - 2¹⁰ = 1239137209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1239138193 and 1239138202.

It is not a weakly prime, because it can be changed into another prime (1239138533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619569116 + 619569117.

It is an arithmetic number, because the mean of its divisors is an integer number (619569117).

Almost surely, 2^1239138233 is an apocalyptic number.

It is an amenable number.

1239138233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239138233 is an equidigital number, since it uses as much as digits as its factorization.

1239138233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 1239138233 is about 35201.3953274583. The cubic root of 1239138233 is about 1074.0881347543.

The spelling of 1239138233 in words is "one billion, two hundred thirty-nine million, one hundred thirty-eight thousand, two hundred thirty-three".