135608131 has 2 divisors, whose sum is σ = 135608132. Its totient is φ = 135608130.

The previous prime is 135608051. The next prime is 135608141. The reversal of 135608131 is 131806531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135608131 - 2¹⁷ = 135477059 is a prime.

It is a super-2 number, since 2×135608131² = 36779130386626322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 135608131.

It is not a weakly prime, because it can be changed into another prime (135608141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67804065 + 67804066.

It is an arithmetic number, because the mean of its divisors is an integer number (67804066).

Almost surely, 2^135608131 is an apocalyptic number.

135608131 is a deficient number, since it is larger than the sum of its proper divisors (1).

135608131 is an equidigital number, since it uses as much as digits as its factorization.

135608131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 135608131 is about 11645.0904247241. The cubic root of 135608131 is about 513.7619186876.

The spelling of 135608131 in words is "one hundred thirty-five million, six hundred eight thousand, one hundred thirty-one".