1138516493 has 4 divisors (see below), whose sum is σ = 1138776960. Its totient is φ = 1138256028.

The previous prime is 1138516403. The next prime is 1138516507. The reversal of 1138516493 is 3946158311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3946158311 = 11071 ⋅356441.

It is a cyclic number.

It is not a de Polignac number, because 1138516493 - 2⁸ = 1138516237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1138516493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138516403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123563 + ... + 132456.

It is an arithmetic number, because the mean of its divisors is an integer number (284694240).

Almost surely, 2^1138516493 is an apocalyptic number.

It is an amenable number.

1138516493 is a deficient number, since it is larger than the sum of its proper divisors (260467).

1138516493 is an equidigital number, since it uses as much as digits as its factorization.

1138516493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260466.

The product of its digits is 77760, while the sum is 41.

The square root of 1138516493 is about 33741.9100378150. The cubic root of 1138516493 is about 1044.1905907698.

The spelling of 1138516493 in words is "one billion, one hundred thirty-eight million, five hundred sixteen thousand, four hundred ninety-three".