136243279 has 2 divisors, whose sum is σ = 136243280. Its totient is φ = 136243278.

The previous prime is 136243277. The next prime is 136243291. The reversal of 136243279 is 972342631.

136243279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136243279 - 2¹ = 136243277 is a prime.

Together with 136243277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136243273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68121639 + 68121640.

It is an arithmetic number, because the mean of its divisors is an integer number (68121640).

Almost surely, 2^136243279 is an apocalyptic number.

136243279 is a deficient number, since it is larger than the sum of its proper divisors (1).

136243279 is an equidigital number, since it uses as much as digits as its factorization.

136243279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 37.

The square root of 136243279 is about 11672.3296303694. The cubic root of 136243279 is about 514.5627721478.

The spelling of 136243279 in words is "one hundred thirty-six million, two hundred forty-three thousand, two hundred seventy-nine".