1768133117 has 4 divisors (see below), whose sum is σ = 1768910556. Its totient is φ = 1767355680.

The previous prime is 1768133099. The next prime is 1768133131. The reversal of 1768133117 is 7113318671.

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 344882041 + 1423251076 = 18571^2 + 37726^2 .

It is a cyclic number.

It is not a de Polignac number, because 1768133117 - 2¹² = 1768129021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1768133137) 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, 385298 + ... + 389859.

It is an arithmetic number, because the mean of its divisors is an integer number (442227639).

Almost surely, 2^1768133117 is an apocalyptic number.

It is an amenable number.

1768133117 is a deficient number, since it is larger than the sum of its proper divisors (777439).

1768133117 is an equidigital number, since it uses as much as digits as its factorization.

1768133117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777438.

The product of its digits is 21168, while the sum is 38.

The square root of 1768133117 is about 42049.1749859614. The cubic root of 1768133117 is about 1209.2190660229.

The spelling of 1768133117 in words is "one billion, seven hundred sixty-eight million, one hundred thirty-three thousand, one hundred seventeen".