1138194718 has 4 divisors (see below), whose sum is σ = 1707292080. Its totient is φ = 569097358.

The previous prime is 1138194691. The next prime is 1138194731. The reversal of 1138194718 is 8174918311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8174918311 = 7 ⋅1167845473.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284548678 + ... + 284548681.

It is an arithmetic number, because the mean of its divisors is an integer number (426823020).

Almost surely, 2^1138194718 is an apocalyptic number.

1138194718 is a deficient number, since it is larger than the sum of its proper divisors (569097362).

1138194718 is an equidigital number, since it uses as much as digits as its factorization.

1138194718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569097361.

The product of its digits is 48384, while the sum is 43.

The square root of 1138194718 is about 33737.1415208817. The cubic root of 1138194718 is about 1044.0922095025.

The spelling of 1138194718 in words is "one billion, one hundred thirty-eight million, one hundred ninety-four thousand, seven hundred eighteen".