135578989 has 32 divisors (see below), whose sum is σ = 174223616. Its totient is φ = 102643200.

The previous prime is 135578987. The next prime is 135579007. The reversal of 135578989 is 989875531.

It is a cyclic number.

It is not a de Polignac number, because 135578989 - 2¹ = 135578987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135578987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225289 + ... + 225889.

It is an arithmetic number, because the mean of its divisors is an integer number (5444488).

Almost surely, 2^135578989 is an apocalyptic number.

It is an amenable number.

135578989 is a deficient number, since it is larger than the sum of its proper divisors (38644627).

135578989 is a wasteful number, since it uses less digits than its factorization.

135578989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its digits is 2721600, while the sum is 55.

The square root of 135578989 is about 11643.8391005716. The cubic root of 135578989 is about 513.7251138088.

The spelling of 135578989 in words is "one hundred thirty-five million, five hundred seventy-eight thousand, nine hundred eighty-nine".