135639377 has 2 divisors, whose sum is σ = 135639378. Its totient is φ = 135639376.

The previous prime is 135639359. The next prime is 135639389. The reversal of 135639377 is 773936531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135466321 + 173056 = 11639^2 + 416^2 .

It is an emirp because it is prime and its reverse (773936531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135639377 - 2⁶ = 135639313 is a prime.

It is not a weakly prime, because it can be changed into another prime (135639307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67819688 + 67819689.

It is an arithmetic number, because the mean of its divisors is an integer number (67819689).

Almost surely, 2^135639377 is an apocalyptic number.

It is an amenable number.

135639377 is a deficient number, since it is larger than the sum of its proper divisors (1).

135639377 is an equidigital number, since it uses as much as digits as its factorization.

135639377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 44.

The square root of 135639377 is about 11646.4319428742. The cubic root of 135639377 is about 513.8013749552.

The spelling of 135639377 in words is "one hundred thirty-five million, six hundred thirty-nine thousand, three hundred seventy-seven".