1238591313 has 12 divisors (see below), whose sum is σ = 1790364420. Its totient is φ = 825133056.

The previous prime is 1238591297. The next prime is 1238591327. The reversal of 1238591313 is 3131958321.

1238591313 is a `hidden beast` number, since 1 + 2 + 38 + 591 + 31 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 479478609 + 759112704 = 21897^2 + 27552^2 .

It is not a de Polignac number, because 1238591313 - 2⁴ = 1238591297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1238591383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36156 + ... + 61517.

It is an arithmetic number, because the mean of its divisors is an integer number (149197035).

Almost surely, 2^1238591313 is an apocalyptic number.

It is an amenable number.

1238591313 is a deficient number, since it is larger than the sum of its proper divisors (551773107).

1238591313 is a wasteful number, since it uses less digits than its factorization.

1238591313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99088 (or 99085 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 1238591313 is about 35193.6260280182. The cubic root of 1238591313 is about 1073.9300876227.

The spelling of 1238591313 in words is "one billion, two hundred thirty-eight million, five hundred ninety-one thousand, three hundred thirteen".