135218469 has 8 divisors (see below), whose sum is σ = 181010592. Its totient is φ = 89786000.

The previous prime is 135218467. The next prime is 135218519. The reversal of 135218469 is 964812531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135218469 - 2¹ = 135218467 is a prime.

It is a super-2 number, since 2×135218469² = 36568068717407922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135218467) 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 7 ways as a sum of consecutive naturals, for example, 89034 + ... + 90539.

It is an arithmetic number, because the mean of its divisors is an integer number (22626324).

Almost surely, 2^135218469 is an apocalyptic number.

It is an amenable number.

135218469 is a deficient number, since it is larger than the sum of its proper divisors (45792123).

135218469 is a wasteful number, since it uses less digits than its factorization.

135218469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179827.

The product of its digits is 51840, while the sum is 39.

The square root of 135218469 is about 11628.3476470219. The cubic root of 135218469 is about 513.2693583717.

The spelling of 135218469 in words is "one hundred thirty-five million, two hundred eighteen thousand, four hundred sixty-nine".