1235231317 has 2 divisors, whose sum is σ = 1235231318. Its totient is φ = 1235231316.

The previous prime is 1235231297. The next prime is 1235231369. The reversal of 1235231317 is 7131325321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1180678321 + 54552996 = 34361^2 + 7386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1235231317 - 2¹¹ = 1235229269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1235231617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617615658 + 617615659.

It is an arithmetic number, because the mean of its divisors is an integer number (617615659).

Almost surely, 2^1235231317 is an apocalyptic number.

It is an amenable number.

1235231317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235231317 is an equidigital number, since it uses as much as digits as its factorization.

1235231317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 28.

The square root of 1235231317 is about 35145.8577502385. The cubic root of 1235231317 is about 1072.9581047497.

Adding to 1235231317 its reverse (7131325321), we get a palindrome (8366556638).

The spelling of 1235231317 in words is "one billion, two hundred thirty-five million, two hundred thirty-one thousand, three hundred seventeen".