135989629 has 2 divisors, whose sum is σ = 135989630. Its totient is φ = 135989628.

The previous prime is 135989587. The next prime is 135989657. The reversal of 135989629 is 926989531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114811225 + 21178404 = 10715^2 + 4602^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135989629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133989629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67994814 + 67994815.

It is an arithmetic number, because the mean of its divisors is an integer number (67994815).

Almost surely, 2^135989629 is an apocalyptic number.

It is an amenable number.

135989629 is a deficient number, since it is larger than the sum of its proper divisors (1).

135989629 is an equidigital number, since it uses as much as digits as its factorization.

135989629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1049760, while the sum is 52.

The square root of 135989629 is about 11661.4591282566. The cubic root of 135989629 is about 514.2432458575.

The spelling of 135989629 in words is "one hundred thirty-five million, nine hundred eighty-nine thousand, six hundred twenty-nine".