135409385 has 4 divisors (see below), whose sum is σ = 162491268. Its totient is φ = 108327504.

The previous prime is 135409367. The next prime is 135409423. The reversal of 135409385 is 583904531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26081449 + 109327936 = 5107^2 + 10456^2 .

It is a cyclic number.

It is not a de Polignac number, because 135409385 - 2⁶ = 135409321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13540934 + ... + 13540943.

It is an arithmetic number, because the mean of its divisors is an integer number (40622817).

Almost surely, 2^135409385 is an apocalyptic number.

It is an amenable number.

135409385 is a deficient number, since it is larger than the sum of its proper divisors (27081883).

135409385 is an equidigital number, since it uses as much as digits as its factorization.

135409385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27081882.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 135409385 is about 11636.5538283463. The cubic root of 135409385 is about 513.5108077621.

The spelling of 135409385 in words is "one hundred thirty-five million, four hundred nine thousand, three hundred eighty-five".