1213134239 has 2 divisors, whose sum is σ = 1213134240. Its totient is φ = 1213134238.

The previous prime is 1213134203. The next prime is 1213134257. The reversal of 1213134239 is 9324313121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213134239 - 2¹² = 1213130143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213134269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606567119 + 606567120.

It is an arithmetic number, because the mean of its divisors is an integer number (606567120).

Almost surely, 2^1213134239 is an apocalyptic number.

1213134239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213134239 is an equidigital number, since it uses as much as digits as its factorization.

1213134239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 29.

The square root of 1213134239 is about 34830.0766436136. The cubic root of 1213134239 is about 1066.5215129413.

The spelling of 1213134239 in words is "one billion, two hundred thirteen million, one hundred thirty-four thousand, two hundred thirty-nine".