538668135 has 12 divisors (see below), whose sum is σ = 933691512. Its totient is φ = 287289648.

The previous prime is 538668131. The next prime is 538668149. The reversal of 538668135 is 531866835.

538668135 is a `hidden beast` number, since 538 + 6 + 6 + 81 + 35 = 666.

It is not a de Polignac number, because 538668135 - 2² = 538668131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 11970403 = 538668135 / (5 + 3 + 8 + 6 + 6 + 8 + 1 + 3 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538668131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5985157 + ... + 5985246.

It is an arithmetic number, because the mean of its divisors is an integer number (77807626).

Almost surely, 2^538668135 is an apocalyptic number.

538668135 is a deficient number, since it is larger than the sum of its proper divisors (395023377).

538668135 is a wasteful number, since it uses less digits than its factorization.

538668135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11970414 (or 11970411 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 538668135 is about 23209.2252132638. The cubic root of 538668135 is about 813.6552453255.

It can be divided in two parts, 53866 and 8135, that added together give a square (62001 = 249²).

The spelling of 538668135 in words is "five hundred thirty-eight million, six hundred sixty-eight thousand, one hundred thirty-five".