135332591 has 2 divisors, whose sum is σ = 135332592. Its totient is φ = 135332590.

The previous prime is 135332551. The next prime is 135332651. The reversal of 135332591 is 195233531.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135332591 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135332521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67666295 + 67666296.

It is an arithmetic number, because the mean of its divisors is an integer number (67666296).

Almost surely, 2^135332591 is an apocalyptic number.

135332591 is a deficient number, since it is larger than the sum of its proper divisors (1).

135332591 is an equidigital number, since it uses as much as digits as its factorization.

135332591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12150, while the sum is 32.

The square root of 135332591 is about 11633.2536721246. The cubic root of 135332591 is about 513.4137145261.

The spelling of 135332591 in words is "one hundred thirty-five million, three hundred thirty-two thousand, five hundred ninety-one".