133166413 has 2 divisors, whose sum is σ = 133166414. Its totient is φ = 133166412.

The previous prime is 133166357. The next prime is 133166417. The reversal of 133166413 is 314661331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132779529 + 386884 = 11523^2 + 622^2 .

It is a cyclic number.

It is not a de Polignac number, because 133166413 - 2¹⁷ = 133035341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133166417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66583206 + 66583207.

It is an arithmetic number, because the mean of its divisors is an integer number (66583207).

Almost surely, 2^133166413 is an apocalyptic number.

It is an amenable number.

133166413 is a deficient number, since it is larger than the sum of its proper divisors (1).

133166413 is an equidigital number, since it uses as much as digits as its factorization.

133166413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 28.

The square root of 133166413 is about 11539.7752577769. The cubic root of 133166413 is about 510.6596781939.

The spelling of 133166413 in words is "one hundred thirty-three million, one hundred sixty-six thousand, four hundred thirteen".