133385569 has 2 divisors, whose sum is σ = 133385570. Its totient is φ = 133385568.

The previous prime is 133385557. The next prime is 133385647. The reversal of 133385569 is 965583331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131790400 + 1595169 = 11480^2 + 1263^2 .

It is a cyclic number.

It is not a de Polignac number, because 133385569 - 2⁵ = 133385537 is a prime.

It is a super-2 number, since 2×133385569² = 35583420034907522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133385509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66692784 + 66692785.

It is an arithmetic number, because the mean of its divisors is an integer number (66692785).

Almost surely, 2^133385569 is an apocalyptic number.

It is an amenable number.

133385569 is a deficient number, since it is larger than the sum of its proper divisors (1).

133385569 is an equidigital number, since it uses as much as digits as its factorization.

133385569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 43.

The square root of 133385569 is about 11549.2670330199. The cubic root of 133385569 is about 510.9396606922.

The spelling of 133385569 in words is "one hundred thirty-three million, three hundred eighty-five thousand, five hundred sixty-nine".