135689243 has 2 divisors, whose sum is σ = 135689244. Its totient is φ = 135689242.

The previous prime is 135689237. The next prime is 135689251. The reversal of 135689243 is 342986531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135689243 - 2⁴ = 135689227 is a prime.

It is a Chen prime.

It is equal to p_7682189 and since 135689243 and 7682189 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135689243.

It is not a weakly prime, because it can be changed into another prime (135689233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67844621 + 67844622.

It is an arithmetic number, because the mean of its divisors is an integer number (67844622).

Almost surely, 2^135689243 is an apocalyptic number.

135689243 is a deficient number, since it is larger than the sum of its proper divisors (1).

135689243 is an equidigital number, since it uses as much as digits as its factorization.

135689243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 135689243 is about 11648.5725734959. The cubic root of 135689243 is about 513.8643313051.

The spelling of 135689243 in words is "one hundred thirty-five million, six hundred eighty-nine thousand, two hundred forty-three".