135577789 has 4 divisors (see below), whose sum is σ = 135657756. Its totient is φ = 135497824.

The previous prime is 135577759. The next prime is 135577829. The reversal of 135577789 is 987775531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987775531 = 17 ⋅58104443.

It can be written as a sum of positive squares in 2 ways, for example, as 22325625 + 113252164 = 4725^2 + 10642^2 .

It is a cyclic number.

It is not a de Polignac number, because 135577789 - 2⁷ = 135577661 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135577759) 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 in 3 ways as a sum of consecutive naturals, for example, 37384 + ... + 40849.

It is an arithmetic number, because the mean of its divisors is an integer number (33914439).

Almost surely, 2^135577789 is an apocalyptic number.

It is an amenable number.

135577789 is a deficient number, since it is larger than the sum of its proper divisors (79967).

135577789 is an equidigital number, since it uses as much as digits as its factorization.

135577789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79966.

The product of its digits is 1852200, while the sum is 52.

The square root of 135577789 is about 11643.7875710612. The cubic root of 135577789 is about 513.7235981562.

The spelling of 135577789 in words is "one hundred thirty-five million, five hundred seventy-seven thousand, seven hundred eighty-nine".