1231134439 has 2 divisors, whose sum is σ = 1231134440. Its totient is φ = 1231134438.

The previous prime is 1231134427. The next prime is 1231134467. The reversal of 1231134439 is 9344311321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231134439 - 2¹⁵ = 1231101671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1231134439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231134479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615567219 + 615567220.

It is an arithmetic number, because the mean of its divisors is an integer number (615567220).

Almost surely, 2^1231134439 is an apocalyptic number.

1231134439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231134439 is an equidigital number, since it uses as much as digits as its factorization.

1231134439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 1231134439 is about 35087.5254043371. The cubic root of 1231134439 is about 1071.7705681379.

The spelling of 1231134439 in words is "one billion, two hundred thirty-one million, one hundred thirty-four thousand, four hundred thirty-nine".