135969959 has 2 divisors, whose sum is σ = 135969960. Its totient is φ = 135969958.

The previous prime is 135969943. The next prime is 135969973. The reversal of 135969959 is 959969531.

135969959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135969959 - 2⁴ = 135969943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135969989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67984979 + 67984980.

It is an arithmetic number, because the mean of its divisors is an integer number (67984980).

Almost surely, 2^135969959 is an apocalyptic number.

135969959 is a deficient number, since it is larger than the sum of its proper divisors (1).

135969959 is an equidigital number, since it uses as much as digits as its factorization.

135969959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2952450, while the sum is 56.

The square root of 135969959 is about 11660.6157213073. The cubic root of 135969959 is about 514.2184507010.

The spelling of 135969959 in words is "one hundred thirty-five million, nine hundred sixty-nine thousand, nine hundred fifty-nine".