133445887 has 2 divisors, whose sum is σ = 133445888. Its totient is φ = 133445886.

The previous prime is 133445861. The next prime is 133445933. The reversal of 133445887 is 788544331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133445887 - 2¹⁹ = 132921599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133445827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66722943 + 66722944.

It is an arithmetic number, because the mean of its divisors is an integer number (66722944).

Almost surely, 2^133445887 is an apocalyptic number.

133445887 is a deficient number, since it is larger than the sum of its proper divisors (1).

133445887 is an equidigital number, since it uses as much as digits as its factorization.

133445887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 43.

The square root of 133445887 is about 11551.8780724175. The cubic root of 133445887 is about 511.0166660593.

The spelling of 133445887 in words is "one hundred thirty-three million, four hundred forty-five thousand, eight hundred eighty-seven".