1138849713 has 20 divisors (see below), whose sum is σ = 1724558308. Its totient is φ = 748828800.

The previous prime is 1138849709. The next prime is 1138849717. The reversal of 1138849713 is 3179488311.

It is an interprime number because it is at equal distance from previous prime (1138849709) and next prime (1138849717).

It can be written as a sum of positive squares in 2 ways, for example, as 366454449 + 772395264 = 19143^2 + 27792^2 .

It is not a de Polignac number, because 1138849713 - 2² = 1138849709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1138849717) 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 19 ways as a sum of consecutive naturals, for example, 90388 + ... + 102213.

Almost surely, 2^1138849713 is an apocalyptic number.

It is an amenable number.

1138849713 is a deficient number, since it is larger than the sum of its proper divisors (585708595).

1138849713 is an equidigital number, since it uses as much as digits as its factorization.

1138849713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192686 (or 192677 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1138849713 is about 33746.8474527622. The cubic root of 1138849713 is about 1044.2924517590.

The spelling of 1138849713 in words is "one billion, one hundred thirty-eight million, eight hundred forty-nine thousand, seven hundred thirteen".