135818437 has 8 divisors (see below), whose sum is σ = 137507832. Its totient is φ = 134136000.

The previous prime is 135818401. The next prime is 135818443. The reversal of 135818437 is 734818531.

It can be written as a sum of positive squares in 4 ways, for example, as 92179201 + 43639236 = 9601^2 + 6606^2 .

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 135818437 - 2¹⁵ = 135785669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135818437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135818477) 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, 45103 + ... + 48019.

It is an arithmetic number, because the mean of its divisors is an integer number (17188479).

Almost surely, 2^135818437 is an apocalyptic number.

It is an amenable number.

135818437 is a deficient number, since it is larger than the sum of its proper divisors (1689395).

135818437 is a wasteful number, since it uses less digits than its factorization.

135818437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479.

The product of its digits is 80640, while the sum is 40.

The square root of 135818437 is about 11654.1167404484. The cubic root of 135818437 is about 514.0273683742.

The spelling of 135818437 in words is "one hundred thirty-five million, eight hundred eighteen thousand, four hundred thirty-seven".