135638273 has 2 divisors, whose sum is σ = 135638274. Its totient is φ = 135638272.

The previous prime is 135638267. The next prime is 135638281. The reversal of 135638273 is 372836531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83046769 + 52591504 = 9113^2 + 7252^2 .

It is a cyclic number.

It is not a de Polignac number, because 135638273 - 2²² = 131443969 is a prime.

It is a super-2 number, since 2×135638273² = 36795482204845058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135638213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67819136 + 67819137.

It is an arithmetic number, because the mean of its divisors is an integer number (67819137).

Almost surely, 2^135638273 is an apocalyptic number.

It is an amenable number.

135638273 is a deficient number, since it is larger than the sum of its proper divisors (1).

135638273 is an equidigital number, since it uses as much as digits as its factorization.

135638273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 135638273 is about 11646.3845462873. The cubic root of 135638273 is about 513.7999809690.

The spelling of 135638273 in words is "one hundred thirty-five million, six hundred thirty-eight thousand, two hundred seventy-three".