136243273 has 2 divisors, whose sum is σ = 136243274. Its totient is φ = 136243272.

The previous prime is 136243229. The next prime is 136243277. The reversal of 136243273 is 372342631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109998144 + 26245129 = 10488^2 + 5123^2 .

It is a cyclic number.

It is not a de Polignac number, because 136243273 - 2⁹ = 136242761 is a prime.

It is not a weakly prime, because it can be changed into another prime (136243277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68121636 + 68121637.

It is an arithmetic number, because the mean of its divisors is an integer number (68121637).

Almost surely, 2^136243273 is an apocalyptic number.

It is an amenable number.

136243273 is a deficient number, since it is larger than the sum of its proper divisors (1).

136243273 is an equidigital number, since it uses as much as digits as its factorization.

136243273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 31.

The square root of 136243273 is about 11672.3293733513. The cubic root of 136243273 is about 514.5627645942.

The spelling of 136243273 in words is "one hundred thirty-six million, two hundred forty-three thousand, two hundred seventy-three".