135969941 has 2 divisors, whose sum is σ = 135969942. Its totient is φ = 135969940.

The previous prime is 135969923. The next prime is 135969943. The reversal of 135969941 is 149969531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131767441 + 4202500 = 11479^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 135969941 - 2¹⁴ = 135953557 is a prime.

Together with 135969943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135969943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67984970 + 67984971.

It is an arithmetic number, because the mean of its divisors is an integer number (67984971).

Almost surely, 2^135969941 is an apocalyptic number.

It is an amenable number.

135969941 is a deficient number, since it is larger than the sum of its proper divisors (1).

135969941 is an equidigital number, since it uses as much as digits as its factorization.

135969941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 47.

The square root of 135969941 is about 11660.6149494784. The cubic root of 135969941 is about 514.2184280099.

The spelling of 135969941 in words is "one hundred thirty-five million, nine hundred sixty-nine thousand, nine hundred forty-one".