135870689 has 2 divisors, whose sum is σ = 135870690. Its totient is φ = 135870688.

The previous prime is 135870677. The next prime is 135870701. The reversal of 135870689 is 986078531.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (135870677) and next prime (135870701).

It can be written as a sum of positive squares in only one way, i.e., 97219600 + 38651089 = 9860^2 + 6217^2 .

It is a cyclic number.

It is not a de Polignac number, because 135870689 - 2¹² = 135866593 is a prime.

It is not a weakly prime, because it can be changed into another prime (135870619) 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, 67935344 + 67935345.

It is an arithmetic number, because the mean of its divisors is an integer number (67935345).

Almost surely, 2^135870689 is an apocalyptic number.

It is an amenable number.

135870689 is a deficient number, since it is larger than the sum of its proper divisors (1).

135870689 is an equidigital number, since it uses as much as digits as its factorization.

135870689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 135870689 is about 11656.3583078078. The cubic root of 135870689 is about 514.0932787052.

The spelling of 135870689 in words is "one hundred thirty-five million, eight hundred seventy thousand, six hundred eighty-nine".