135875591 has 2 divisors, whose sum is σ = 135875592. Its totient is φ = 135875590.

The previous prime is 135875567. The next prime is 135875629. The reversal of 135875591 is 195578531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135875591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135875501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67937795 + 67937796.

It is an arithmetic number, because the mean of its divisors is an integer number (67937796).

Almost surely, 2^135875591 is an apocalyptic number.

135875591 is a deficient number, since it is larger than the sum of its proper divisors (1).

135875591 is an equidigital number, since it uses as much as digits as its factorization.

135875591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189000, while the sum is 44.

The square root of 135875591 is about 11656.5685774159. The cubic root of 135875591 is about 514.0994611888.

The spelling of 135875591 in words is "one hundred thirty-five million, eight hundred seventy-five thousand, five hundred ninety-one".