1138640017 has 4 divisors (see below), whose sum is σ = 1146951396. Its totient is φ = 1130328640.

The previous prime is 1138639981. The next prime is 1138640033. The reversal of 1138640017 is 7100468311.

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

It can be written as a sum of positive squares in 2 ways, for example, as 381069441 + 757570576 = 19521^2 + 27524^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138640017 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1138640077) 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, 4155484 + ... + 4155757.

It is an arithmetic number, because the mean of its divisors is an integer number (286737849).

Almost surely, 2^1138640017 is an apocalyptic number.

It is an amenable number.

1138640017 is a deficient number, since it is larger than the sum of its proper divisors (8311379).

1138640017 is an equidigital number, since it uses as much as digits as its factorization.

1138640017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8311378.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1138640017 is about 33743.7404121120. The cubic root of 1138640017 is about 1044.2283527565.

The spelling of 1138640017 in words is "one billion, one hundred thirty-eight million, six hundred forty thousand, seventeen".