1138511819 has 4 divisors (see below), whose sum is σ = 1141105680. Its totient is φ = 1135917960.

The previous prime is 1138511813. The next prime is 1138511837. The reversal of 1138511819 is 9181158311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138511819 is a prime.

It is a super-2 number, since 2×1138511819² = 2592418324005377522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138511813) 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, 1296272 + ... + 1297149.

It is an arithmetic number, because the mean of its divisors is an integer number (285276420).

Almost surely, 2^1138511819 is an apocalyptic number.

1138511819 is a deficient number, since it is larger than the sum of its proper divisors (2593861).

1138511819 is an equidigital number, since it uses as much as digits as its factorization.

1138511819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593860.

The product of its digits is 8640, while the sum is 38.

The square root of 1138511819 is about 33741.8407766974. The cubic root of 1138511819 is about 1044.1891618478.

The spelling of 1138511819 in words is "one billion, one hundred thirty-eight million, five hundred eleven thousand, eight hundred nineteen".