135660413 has 4 divisors (see below), whose sum is σ = 155040480. Its totient is φ = 116280348.

The previous prime is 135660383. The next prime is 135660439. The reversal of 135660413 is 314066531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 314066531 = 227 ⋅1383553.

It is a cyclic number.

It is not a de Polignac number, because 135660413 - 2¹⁴ = 135644029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135660113) 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, 9690023 + ... + 9690036.

It is an arithmetic number, because the mean of its divisors is an integer number (38760120).

Almost surely, 2^135660413 is an apocalyptic number.

It is an amenable number.

135660413 is a deficient number, since it is larger than the sum of its proper divisors (19380067).

135660413 is an equidigital number, since it uses as much as digits as its factorization.

135660413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19380066.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 135660413 is about 11647.3350170758. The cubic root of 135660413 is about 513.8279350080.

The spelling of 135660413 in words is "one hundred thirty-five million, six hundred sixty thousand, four hundred thirteen".