135687537 has 12 divisors (see below), whose sum is σ = 196094080. Its totient is φ = 90411768.

The previous prime is 135687499. The next prime is 135687571. The reversal of 135687537 is 735786531.

135687537 is a `hidden beast` number, since 1 + 35 + 6 + 87 + 537 = 666.

It is not a de Polignac number, because 135687537 - 2¹⁵ = 135654769 is a prime.

It is a super-2 number, since 2×135687537² = 36822215394252738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135687492 and 135687501.

It is not an unprimeable number, because it can be changed into a prime (135680537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32664 + ... + 36582.

Almost surely, 2^135687537 is an apocalyptic number.

It is an amenable number.

135687537 is a deficient number, since it is larger than the sum of its proper divisors (60406543).

135687537 is a wasteful number, since it uses less digits than its factorization.

135687537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7772 (or 7769 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 135687537 is about 11648.4993454093. The cubic root of 135687537 is about 513.8621777170.

The spelling of 135687537 in words is "one hundred thirty-five million, six hundred eighty-seven thousand, five hundred thirty-seven".