133785769 has 8 divisors (see below), whose sum is σ = 144171720. Its totient is φ = 123413376.

The previous prime is 133785763. The next prime is 133785793. The reversal of 133785769 is 967587331.

It can be written as a sum of positive squares in 4 ways, for example, as 29030544 + 104755225 = 5388^2 + 10235^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133785769 - 2¹³ = 133777577 is a prime.

It is a super-2 number, since 2×133785769² = 35797263973842722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133785763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27789 + ... + 32245.

It is an arithmetic number, because the mean of its divisors is an integer number (18021465).

Almost surely, 2^133785769 is an apocalyptic number.

It is an amenable number.

133785769 is a deficient number, since it is larger than the sum of its proper divisors (10385951).

133785769 is a wasteful number, since it uses less digits than its factorization.

133785769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6779.

The product of its digits is 952560, while the sum is 49.

The square root of 133785769 is about 11566.5798315665. The cubic root of 133785769 is about 511.4501454314.

The spelling of 133785769 in words is "one hundred thirty-three million, seven hundred eighty-five thousand, seven hundred sixty-nine".