135968999 has 2 divisors, whose sum is σ = 135969000. Its totient is φ = 135968998.

The previous prime is 135968983. The next prime is 135969013. The reversal of 135968999 is 999869531.

135968999 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 an emirp because it is prime and its reverse (999869531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135968999 - 2⁴ = 135968983 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135968909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67984499 + 67984500.

It is an arithmetic number, because the mean of its divisors is an integer number (67984500).

Almost surely, 2^135968999 is an apocalyptic number.

135968999 is a deficient number, since it is larger than the sum of its proper divisors (1).

135968999 is an equidigital number, since it uses as much as digits as its factorization.

135968999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4723920, while the sum is 59.

The square root of 135968999 is about 11660.5745570276. The cubic root of 135968999 is about 514.2172405051.

The spelling of 135968999 in words is "one hundred thirty-five million, nine hundred sixty-eight thousand, nine hundred ninety-nine".