135518491 has 2 divisors, whose sum is σ = 135518492. Its totient is φ = 135518490.

The previous prime is 135518483. The next prime is 135518503. The reversal of 135518491 is 194815531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135518491 - 2³ = 135518483 is a prime.

It is a super-2 number, since 2×135518491² = 36730522805834162, 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 135518491.

It is not a weakly prime, because it can be changed into another prime (135518291) 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 as a sum of consecutive naturals, namely, 67759245 + 67759246.

It is an arithmetic number, because the mean of its divisors is an integer number (67759246).

Almost surely, 2^135518491 is an apocalyptic number.

135518491 is a deficient number, since it is larger than the sum of its proper divisors (1).

135518491 is an equidigital number, since it uses as much as digits as its factorization.

135518491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 37.

The square root of 135518491 is about 11641.2409561868. The cubic root of 135518491 is about 513.6486910385.

The spelling of 135518491 in words is "one hundred thirty-five million, five hundred eighteen thousand, four hundred ninety-one".