133891489 has 2 divisors, whose sum is σ = 133891490. Its totient is φ = 133891488.

The previous prime is 133891477. The next prime is 133891501. The reversal of 133891489 is 984198331.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (133891477) and next prime (133891501).

It can be written as a sum of positive squares in only one way, i.e., 95550625 + 38340864 = 9775^2 + 6192^2 .

It is a cyclic number.

It is not a de Polignac number, because 133891489 - 2⁷ = 133891361 is a prime.

It is not a weakly prime, because it can be changed into another prime (133891469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66945744 + 66945745.

It is an arithmetic number, because the mean of its divisors is an integer number (66945745).

Almost surely, 2^133891489 is an apocalyptic number.

It is an amenable number.

133891489 is a deficient number, since it is larger than the sum of its proper divisors (1).

133891489 is an equidigital number, since it uses as much as digits as its factorization.

133891489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 46.

The square root of 133891489 is about 11571.1489922133. The cubic root of 133891489 is about 511.5848290965.

It can be divided in two parts, 13389 and 1489, that added together give a triangular number (14878 = T₁₇₂).

The spelling of 133891489 in words is "one hundred thirty-three million, eight hundred ninety-one thousand, four hundred eighty-nine".