1138596491 has 8 divisors (see below), whose sum is σ = 1155999600. Its totient is φ = 1121296000.

The previous prime is 1138596457. The next prime is 1138596493. The reversal of 1138596491 is 1946958311.

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

It is a cyclic number.

It is not a de Polignac number, because 1138596491 - 2³⁰ = 64854667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138596493) 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 7 ways as a sum of consecutive naturals, for example, 3146 + ... + 47823.

It is an arithmetic number, because the mean of its divisors is an integer number (144499950).

Almost surely, 2^1138596491 is an apocalyptic number.

1138596491 is a deficient number, since it is larger than the sum of its proper divisors (17403109).

1138596491 is an equidigital number, since it uses as much as digits as its factorization.

1138596491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51309.

The product of its digits is 233280, while the sum is 47.

The square root of 1138596491 is about 33743.0954567005. The cubic root of 1138596491 is about 1044.2150469233.

The spelling of 1138596491 in words is "one billion, one hundred thirty-eight million, five hundred ninety-six thousand, four hundred ninety-one".