133420669 has 2 divisors, whose sum is σ = 133420670. Its totient is φ = 133420668.

The previous prime is 133420657. The next prime is 133420699. The reversal of 133420669 is 966024331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86676100 + 46744569 = 9310^2 + 6837^2 .

It is a cyclic number.

It is not a de Polignac number, because 133420669 - 2²⁵ = 99866237 is a prime.

It is a super-2 number, since 2×133420669² = 35602149832815122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133420699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66710334 + 66710335.

It is an arithmetic number, because the mean of its divisors is an integer number (66710335).

Almost surely, 2^133420669 is an apocalyptic number.

It is an amenable number.

133420669 is a deficient number, since it is larger than the sum of its proper divisors (1).

133420669 is an equidigital number, since it uses as much as digits as its factorization.

133420669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 133420669 is about 11550.7865100174. The cubic root of 133420669 is about 510.9844741588.

The spelling of 133420669 in words is "one hundred thirty-three million, four hundred twenty thousand, six hundred sixty-nine".