135684553 has 2 divisors, whose sum is σ = 135684554. Its totient is φ = 135684552.

The previous prime is 135684481. The next prime is 135684583. The reversal of 135684553 is 355486531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135675904 + 8649 = 11648^2 + 93^2 .

It is a cyclic number.

It is not a de Polignac number, because 135684553 - 2⁹ = 135684041 is a prime.

It is not a weakly prime, because it can be changed into another prime (135684583) 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, 67842276 + 67842277.

It is an arithmetic number, because the mean of its divisors is an integer number (67842277).

Almost surely, 2^135684553 is an apocalyptic number.

It is an amenable number.

135684553 is a deficient number, since it is larger than the sum of its proper divisors (1).

135684553 is an equidigital number, since it uses as much as digits as its factorization.

135684553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216000, while the sum is 40.

The square root of 135684553 is about 11648.3712595367. The cubic root of 135684553 is about 513.8584107879.

The spelling of 135684553 in words is "one hundred thirty-five million, six hundred eighty-four thousand, five hundred fifty-three".