1308240013 has 8 divisors (see below), whose sum is σ = 1347902136. Its totient is φ = 1268947200.

The previous prime is 1308240001. The next prime is 1308240053. The reversal of 1308240013 is 3100428031.

It can be written as a sum of positive squares in 4 ways, for example, as 538843369 + 769396644 = 23213^2 + 27738^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1308240013 is a prime.

It is a super-2 number, since 2×1308240013² = 3422983863228480338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308240053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85128 + ... + 99313.

It is an arithmetic number, because the mean of its divisors is an integer number (168487767).

Almost surely, 2^1308240013 is an apocalyptic number.

It is an amenable number.

1308240013 is a deficient number, since it is larger than the sum of its proper divisors (39662123).

1308240013 is a wasteful number, since it uses less digits than its factorization.

1308240013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184655.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1308240013 is about 36169.6006751526. The cubic root of 1308240013 is about 1093.6939490493.

Adding to 1308240013 its reverse (3100428031), we get a palindrome (4408668044).

The spelling of 1308240013 in words is "one billion, three hundred eight million, two hundred forty thousand, thirteen".