1138587523 has 4 divisors (see below), whose sum is σ = 1146229200. Its totient is φ = 1130945848.

The previous prime is 1138587493. The next prime is 1138587533. The reversal of 1138587523 is 3257858311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1138587523 - 2¹³ = 1138579331 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 1138587523.

It is not an unprimeable number, because it can be changed into a prime (1138587533) 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, 3820615 + ... + 3820912.

It is an arithmetic number, because the mean of its divisors is an integer number (286557300).

Almost surely, 2^1138587523 is an apocalyptic number.

1138587523 is a deficient number, since it is larger than the sum of its proper divisors (7641677).

1138587523 is an equidigital number, since it uses as much as digits as its factorization.

1138587523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7641676.

The product of its digits is 201600, while the sum is 43.

The square root of 1138587523 is about 33742.9625699938. The cubic root of 1138587523 is about 1044.2123053770.

The spelling of 1138587523 in words is "one billion, one hundred thirty-eight million, five hundred eighty-seven thousand, five hundred twenty-three".