1311230959 has 2 divisors, whose sum is σ = 1311230960. Its totient is φ = 1311230958.

The previous prime is 1311230939. The next prime is 1311231001. The reversal of 1311230959 is 9590321131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311230959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311230909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655615479 + 655615480.

It is an arithmetic number, because the mean of its divisors is an integer number (655615480).

Almost surely, 2^1311230959 is an apocalyptic number.

1311230959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311230959 is an equidigital number, since it uses as much as digits as its factorization.

1311230959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 1311230959 is about 36210.9232000511. The cubic root of 1311230959 is about 1094.5267956662.

The spelling of 1311230959 in words is "one billion, three hundred eleven million, two hundred thirty thousand, nine hundred fifty-nine".