133465609 has 2 divisors, whose sum is σ = 133465610. Its totient is φ = 133465608.

The previous prime is 133465597. The next prime is 133465613. The reversal of 133465609 is 906564331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120934009 + 12531600 = 10997^2 + 3540^2 .

It is a cyclic number.

It is not a de Polignac number, because 133465609 - 2¹³ = 133457417 is a prime.

It is not a weakly prime, because it can be changed into another prime (133465639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66732804 + 66732805.

It is an arithmetic number, because the mean of its divisors is an integer number (66732805).

Almost surely, 2^133465609 is an apocalyptic number.

It is an amenable number.

133465609 is a deficient number, since it is larger than the sum of its proper divisors (1).

133465609 is an equidigital number, since it uses as much as digits as its factorization.

133465609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 133465609 is about 11552.7316683112. The cubic root of 133465609 is about 511.0418392449.

The spelling of 133465609 in words is "one hundred thirty-three million, four hundred sixty-five thousand, six hundred nine".