135689093 has 4 divisors (see below), whose sum is σ = 135832428. Its totient is φ = 135545760.

The previous prime is 135689083. The next prime is 135689107. The reversal of 135689093 is 390986531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 390986531 = 13 ⋅30075887.

It can be written as a sum of positive squares in 2 ways, for example, as 63473089 + 72216004 = 7967^2 + 8498^2 .

It is a cyclic number.

It is not a de Polignac number, because 135689093 - 2²⁶ = 68580229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135689083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70238 + ... + 72143.

It is an arithmetic number, because the mean of its divisors is an integer number (33958107).

Almost surely, 2^135689093 is an apocalyptic number.

It is an amenable number.

135689093 is a deficient number, since it is larger than the sum of its proper divisors (143335).

135689093 is an equidigital number, since it uses as much as digits as its factorization.

135689093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143334.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 135689093 is about 11648.5661349370. The cubic root of 135689093 is about 513.8641419517.

The spelling of 135689093 in words is "one hundred thirty-five million, six hundred eighty-nine thousand, ninety-three".