133021439 has 2 divisors, whose sum is σ = 133021440. Its totient is φ = 133021438.

The previous prime is 133021429. The next prime is 133021457. The reversal of 133021439 is 934120331.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (934120331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133021439 - 2⁴ = 133021423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133021429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66510719 + 66510720.

It is an arithmetic number, because the mean of its divisors is an integer number (66510720).

Almost surely, 2^133021439 is an apocalyptic number.

133021439 is a deficient number, since it is larger than the sum of its proper divisors (1).

133021439 is an equidigital number, since it uses as much as digits as its factorization.

133021439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 133021439 is about 11533.4920557479. The cubic root of 133021439 is about 510.4742979709.

It can be divided in two parts, 13302 and 1439, that added together give a palindrome (14741).

The spelling of 133021439 in words is "one hundred thirty-three million, twenty-one thousand, four hundred thirty-nine".