133683377717 has 4 divisors (see below), whose sum is σ = 141547105836. Its totient is φ = 125819649600.

The previous prime is 133683377689. The next prime is 133683377719. The reversal of 133683377717 is 717773386331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 717773386331 = 19 ⋅37777546649.

It can be written as a sum of positive squares in 2 ways, for example, as 66726122596 + 66957255121 = 258314^2 + 258761^2 .

It is a cyclic number.

It is not a de Polignac number, because 133683377717 - 2¹⁴ = 133683361333 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 (133683377719) 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, 3931864034 + ... + 3931864067.

It is an arithmetic number, because the mean of its divisors is an integer number (35386776459).

Almost surely, 2^133683377717 is an apocalyptic number.

133683377717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

133683377717 is a deficient number, since it is larger than the sum of its proper divisors (7863728119).

133683377717 is an equidigital number, since it uses as much as digits as its factorization.

133683377717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7863728118.

The product of its digits is 9335088, while the sum is 56.

The spelling of 133683377717 in words is "one hundred thirty-three billion, six hundred eighty-three million, three hundred seventy-seven thousand, seven hundred seventeen".