1238311613 has 16 divisors (see below), whose sum is σ = 1558043520. Its totient is φ = 956059200.

The previous prime is 1238311609. The next prime is 1238311619. The reversal of 1238311613 is 3161138321.

It is a cyclic number.

It is not a de Polignac number, because 1238311613 - 2² = 1238311609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238311619) 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 in 15 ways as a sum of consecutive naturals, for example, 65378 + ... + 82163.

It is an arithmetic number, because the mean of its divisors is an integer number (97377720).

Almost surely, 2^1238311613 is an apocalyptic number.

It is an amenable number.

1238311613 is a deficient number, since it is larger than the sum of its proper divisors (319731907).

1238311613 is a wasteful number, since it uses less digits than its factorization.

1238311613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147668.

The product of its digits is 2592, while the sum is 29.

The square root of 1238311613 is about 35189.6520727330. The cubic root of 1238311613 is about 1073.8492428609.

Adding to 1238311613 its reverse (3161138321), we get a palindrome (4399449934).

The spelling of 1238311613 in words is "one billion, two hundred thirty-eight million, three hundred eleven thousand, six hundred thirteen".